The current through the 12 Ω resistor is 0.4167 A. In the given circuit, the 12 Ω resistor is in series with other resistors. To find the current, we can apply Ohm's Law (V = I * R), where V is the voltage across the resistor and R is the resistance.
The voltage across the 12 Ω resistor is the same as the voltage across the 30 Ω resistor, which is given as 5 V. Therefore, the current through the 12 Ω resistor can be calculated as I = V / R = 5 V / 12 Ω = 0.4167 A.
In the circuit, the potential difference across the 12 Ω resistor is 5 V. This is because the voltage across the 30 Ω resistor is given as 5 V, and since the 12 Ω resistor is in series with the 30 Ω resistor, they share the same potential difference.
The 12 Ω resistor is in series with other resistors in the circuit. When resistors are connected in series, the total resistance is equal to the sum of individual resistances. In this case, we are given the voltage across the 30 Ω resistor, which allows us to calculate the current through it using Ohm's Law.
Since the 12 Ω resistor is in series with the 30 Ω resistor, they share the same current. We can then calculate the current through the 12 Ω resistor by applying the same current value. Furthermore, since the 12 Ω resistor is in series with the 30 Ω resistor, they have the same potential difference across them.
Thus, the potential difference across the 12 Ω resistor is equal to the potential difference across the 30 Ω resistor, which is given as 5 V.
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Calculate the angle for the third-order maximum of 595 nm wavelength yellow light falling on double slits separated by 0.100 mm.
In this case, the angle for the third-order maximum can be found to be approximately 0.036 degrees. The formula is given by: sinθ = mλ / d
To calculate the angle for the third-order maximum of 595 nm yellow light falling on double slits separated by 0.100 mm, we can use the formula for the location of interference maxima in a double-slit experiment. The formula is given by:
sinθ = mλ / d
Where θ is the angle of the maximum, m is the order of the maximum, λ is the wavelength of light, and d is the separation between the double slits.
In this case, we have a third-order maximum (m = 3) and a yellow light with a wavelength of 595 nm (λ = 595 × 10^(-9) m). The separation between the double slits is 0.100 mm (d = 0.100 × 10^(-3) m).
Plugging in these values into the formula, we can calculate the angle:
sinθ = (3 × 595 × 10^(-9)) / (0.100 × 10^(-3))
sinθ = 0.01785
Taking the inverse sine (sin^(-1)) of both sides, we find:
θ ≈ 0.036 degrees
Therefore, the angle for the third-order maximum of 595 nm yellow light falling on double slits separated by 0.100 mm is approximately 0.036 degrees.
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You fire a cannon horizontally off a 50 meter tall wall. The cannon ball lands 1000 m away. What was the initial velocity?
To determine the initial velocity of the cannonball, we can use the equations of motion under constant acceleration. The initial velocity of the cannonball is approximately 313.48 m/s.
Since the cannonball is fired horizontally, the initial vertical velocity is zero. The only force acting on the cannonball in the vertical direction is gravity.
The vertical motion of the cannonball can be described by the equation h = (1/2)gt^2, where h is the height, g is the acceleration due to gravity (approximately 9.8 m/s^2), and t is the time of flight.
Given that the cannonball is fired from a 50-meter-tall wall and lands 1000 m away, we can set up two equations: one for the vertical motion and one for the horizontal motion.
For the vertical motion: h = (1/2)gt^2
Substituting h = 50 m and solving for t, we find t ≈ 3.19 s.
For the horizontal motion: d = vt, where d is the horizontal distance and v is the initial velocity.
Substituting d = 1000 m and t = 3.19 s, we can solve for v: v = d/t ≈ 313.48 m/s.
Therefore, the initial velocity of the cannonball is approximately 313.48 m/s.
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Two tractors are being used to pull a tree stump out of the ground. The larger tractor pulls with a force of 3000 to the east. The smaller tractor pulls with a force of 2300 N in a northeast direction. Determine the magnitude of the resultant force and the angle it makes with the 3000 N force.
The magnitude of the resultant force, if the force of larger tractor is 3000 N and force of smaller tractor is 2300 N, is 3780.1N and the angle it makes with the 3000N force is 38.7° to the northeast direction.
The force of the larger tractor is 3000 N, and the force of the smaller tractor is 2300 N in a northeast direction.
We can find the resultant force using the Pythagorean theorem, which states that in a right-angled triangle the square of the hypotenuse is equal to the sum of the squares of the other two sides.
Using the given values, let's determine the resultant force:
Total force = √(3000² + 2300²)
Total force = √(9,000,000 + 5,290,000)
Total force = √14,290,000
Total force = 3780.1 N (rounded to one decimal place)
The magnitude of the resultant force is 3780.1 N.
We can use the tangent ratio to find the angle that the resultant force makes with the 3000 N force.
tan θ = opposite/adjacent
tan θ = 2300/3000
θ = tan⁻¹(0.7667)
θ = 38.66°
The angle that the resultant force makes with the 3000 N force is approximately 38.7° to the northeast direction.
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Protein centrifugation is a technique commonly used to separate proteins according to size. In this technique proteins are spun in a test tube with some high rotational frequency w in a solvent with high density p (and viscosity n). For a spherical particle of radius R and density Ppfind the drift velocity (vdrift) of the particle as it moves through the fluid due to the centrifugal force. Hint: the particle's drag force (Fdrag = bnRv drift) is equal to the centrifugal force (Fcent = mw?r, where r is the molecule's distance from the rotation axis).
vdrift = (mω^2r) / (bnR)
The drift velocity (vdrift) of the particle as it moves through the fluid due to the centrifugal force is given by the equation above.
To find the drift velocity (vdrift) of a spherical particle moving through a fluid due to the centrifugal force, we need to equate the drag force and the centrifugal force acting on the particle.
The drag force (Fdrag) acting on the particle can be expressed as:
Fdrag = bnRvdrift
where b is a drag coefficient, n is the viscosity of the fluid, R is the radius of the particle, and vdrift is the drift velocity.
The centrifugal force (Fcent) acting on the particle can be expressed as:
Fcent = mω^2r
where m is the mass of the particle, ω is the angular frequency of rotation, and r is the distance of the particle from the rotation axis.
Equating Fdrag and Fcent, we have:
bnRvdrift = mω^2r
Simplifying the equation, we can solve for vdrift:
vdrift = (mω^2r) / (bnR)
Therefore, the drift velocity (vdrift) of the particle as it moves through the fluid due to the centrifugal force is given by the equation above.
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What is the height of the shown 312.7 g Aluminum cylinder whose radius is 7.57 cm, given that the density of Alum. is 2.7 X 10 Kg/m? r h m
The height of the aluminum cylinder whose radius is 7.57 cm, given that the density of Aluminium is 2.7 X 10 Kg/m is approximately 6.40 cm.
Given that,
Weight of the Aluminum cylinder = 312.7 g = 0.3127 kg
Radius of the Aluminum cylinder = 7.57 cm
Density of Aluminum = 2.7 × 10³ kg/m³
Let us find out the height of the Aluminum cylinder.
Formula used : Volume of cylinder = πr²h
We know, Mass = Density × Volume
Therefore, Volume = Mass/Density
V = 0.3127/ (2.7 × 10³)V = 0.0001158 m³
Volume of the cylinder = πr²h
0.0001158 = π × (7.57 × 10⁻²)² × h
0.0001158 = π × (5.72849 × 10⁻³) × h
0.0001158 = 1.809557 × 10⁻⁵ × h
6.40 = h
Therefore, the height of the aluminum cylinder is approximately 6.40 cm.
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Two forces act on a body of 4.5 kg and displace it by 7.4 m. First force is of 9.6 N making an angle 185° with positive x-axis whereas the second force is 8.0 N making an angle of 310°. Find the net work done by these forces. Answer: Choose... Check
the net work done by the given forces is approximately -15.54 J, or -15.5 J (rounded to one decimal place).-15.5 J.
In physics, work is defined as the product of force and displacement. The unit of work is Joule, represented by J, and is a scalar quantity. To find the net work done by the given forces, we need to find the work done by each force separately and then add them up. Let's calculate the work done by the first force, F1, and the second force, F2, separately:Work done by F1:W1 = F1 × d × cos θ1where F1 = 9.6 N (force), d = 7.4 m (displacement), and θ1 = 185° (angle between F1 and the positive x-axis)W1 = 9.6 × 7.4 × cos 185°W1 ≈ - 64.15 J (rounded to two decimal places since work is a scalar quantity)The negative sign indicates that the work done by F1 is in the opposite direction to the displacement.Work done by F2:W2 = F2 × d × cos θ2where F2 = 8.0 N (force), d = 7.4 m (displacement), and θ2 = 310° (angle between F2 and the positive x-axis)W2 = 8.0 × 7.4 × cos 310°W2 ≈ 48.61 J (rounded to two decimal places)Now we can find the net work done by adding up the work done by each force:Net work done:W = W1 + W2W = (- 64.15) + 48.61W ≈ - 15.54 J (rounded to two decimal places)Therefore,
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A car is placed on a hydraulic lift. The car has a mass of 1598 kg. The hydraulic piston on the lift has a cross sectional area of 25 cm2 while the piston on the pump side has a cross sectional area of 7 cm2. How much force in Newtons is needed
on the pump piston to lift the car?
The force in Newtons that is needed on the pump piston to lift the car is 4,399.69 N.
The hydraulic lift operates by Pascal's Law, which states that pressure exerted on a fluid in a closed container is transmitted uniformly in all directions throughout the fluid. Therefore, the force exerted on the larger piston is equal to the force exerted on the smaller piston. Here's how to calculate the force needed on the pump piston to lift the car.
Step 1: Find the force on the hydraulic piston lifting the car
The force on the hydraulic piston lifting the car is given by:
F1 = m * g where m is the mass of the car and g is the acceleration due to gravity.
F1 = 1598 kg * 9.81 m/s²
F1 = 15,664.38 N
Step 2: Calculate the ratio of the areas of the hydraulic piston and pump piston
The ratio of the areas of the hydraulic piston and pump piston is given by:
A1/A2 = F2/F1 where
A1 is the area of the hydraulic piston,
A2 is the area of the pump piston,
F1 is the force on the hydraulic piston, and
F2 is the force on the pump piston.
A1/A2 = F2/F1A1 = 25 cm²A2 = 7 cm²
F1 = 15,664.38 N
A1/A2 = 25/7
Step 3: Calculate the force on the pump piston
The force on the pump piston is given by:
F2 = F1 * A2/A1
F2 = 15,664.38 N * 7/25
F2 = 4,399.69 N
Therefore, the force needed on the pump piston to lift the car is 4,399.69 N (approximately).Thus, the force in Newtons that is needed on the pump piston to lift the car is 4,399.69 N.
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Calculate the number of photons emitted per second from one square meter of the sun's surface (assume that it radiates like a black-body) in the wavelength range from 1038 nm to 1038.01 nm. Assume the surface temperature is 5500 K Your answer _______________ photons/m²/s
The number of photons emitted per second from one square meter of the Sun's surface in the specified wavelength range is approximately 4.59 x 10^13 photons/m²/s.
To calculate the number of photons emitted per second from one sq meter of the Sun's surface in the given wavelength range, we can use Planck's law and integrate the spectral radiance over the specified range.
Assuming the Sun radiates like a black body with a surface temperature of 5500 K, the number of photons emitted per second from one square meter of the Sun's surface in the wavelength range from 1038 nm to 1038.01 nm is approximately 4.59 x 10^13 photons/m²/s.
Planck's law describes the spectral radiance (Bλ) of a black body at a given wavelength (λ) and temperature (T). It can be expressed as Bλ = (2hc²/λ⁵) / (e^(hc/λkT) - 1), where h is Planck's constant, c is the speed of light, and k is Boltzmann's constant.
To calculate the number of photons emitted per second (N) from one square meter of the Sun's surface in the given wavelength range, we can integrate the spectral radiance over the range and divide by the energy of each photon (E = hc/λ).
First, we calculate the spectral radiance at the given temperature and wavelength range. Using the provided values, we find Bλ(λ = 1038 nm) = 6.37 x 10^13 W·m⁻²·sr⁻¹·nm⁻¹ and Bλ(λ = 1038.01 nm) = 6.31 x 10^13 W·m⁻²·sr⁻¹·nm⁻¹. Next, we integrate the spectral radiance over the range by taking the average of the two values and multiplying it by the wavelength difference (∆λ = 0.01 nm).
The average spectral radiance = (Bλ(λ = 1038 nm) + Bλ(λ = 1038.01 nm))/2 = 6.34 x 10^13 W·m⁻²·sr⁻¹·nm⁻¹.
Finally, we calculate the number of photons emitted per second:
N = (average spectral radiance) * (∆λ) / E = (6.34 x 10^13 W·m⁻²·sr⁻¹·nm⁻¹) * (0.01 nm) / (hc/λ) = 4.59 x 10^13 photons/m²/s.
Therefore, the number of photons emitted per second from one square meter of the Sun's surface in the specified wavelength range is approximately 4.59 x 10^13 photons/m²/s.
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0. Mr. Nidup found a ball lying in his bedroom at night. He wanted to see the colour of the ball but he had only three coloured light, yellow, green and blue. So, he looked at it under three different coloured light, and confirmed the colour of the ball. He saw the ball black under blue and green light and red under yellow light. The actual colour of the ball is a: green b: red c: yellow d: white
Mr. Nidup found a ball lying in his bedroom at night. He wanted to see the colour of the ball but he had only three coloured light, yellow, green and blue. So, he looked at it under three different coloured light and The actual color of the ball is b red
Based on the information provided, we can deduce the actual color of the ball.
When Mr. Nidup looked at the ball under blue and green light, and perceived it as black, it means that the ball absorbs both blue and green light. This suggests that the ball does not reflect these colors and therefore does not appear as blue or green.
However, when Mr. Nidup looked at the ball under yellow light and perceived it as red, it indicates that the ball reflects red light while absorbing other colors. Since the ball appears red under yellow light, it means that red light is being reflected, making red the actual color of the ball.
Therefore, the correct answer is b: red. The ball appears black under blue and green light because it absorbs these colors, and it appears red under yellow light because it reflects red light. Therefore, Option b is correct.
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A uniform, solid cylinder of radius 7.00 cm and mass 5.00 kg starts from rest at the top of an inclined plane that is 2.00 m long and tilted at an angle of 21.0∘ with the horizontal. The cylinder rolls without slipping down the ramp. What is the cylinder's speed v at the bottom of the ramp? v= m/s
The speed of the cylinder at the bottom of the ramp can be determined by using the principle of conservation of energy.
The formula for the speed of a rolling object down an inclined plane is given by v = √(2gh/(1+(k^2))), where v is the speed, g is the acceleration due to gravity, h is the height of the ramp, and k is the radius of gyration. By substituting the given values into the equation, the speed v can be calculated.
The principle of conservation of energy states that the total mechanical energy of a system remains constant. In this case, the initial potential energy at the top of the ramp is converted into both translational kinetic energy and rotational kinetic energy at the bottom of the ramp.
To calculate the speed, we first determine the potential energy at the top of the ramp using the formula PE = mgh, where m is the mass of the cylinder, g is the acceleration due to gravity, and h is the height of the ramp.
Next, we calculate the rotational kinetic energy using the formula KE_rot = (1/2)Iω^2, where I is the moment of inertia of the cylinder and ω is its angular velocity. For a solid cylinder rolling without slipping, the moment of inertia is given by I = (1/2)mr^2, where r is the radius of the cylinder.
Using the conservation of energy, we equate the initial potential energy to the sum of translational and rotational kinetic energies:
PE = KE_trans + KE_rot
Simplifying the equation and solving for v, we get:
v = √(2gh/(1+(k^2)))
By substituting the given values of g, h, and k into the equation, we can calculate the speed v of the cylinder at the bottom of the ramp.
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1.) An interference pattern from a double‑slit experiment displays 1010 bright and dark fringes per centimeter on a screen that is 8.40 m8.40 m away. The wavelength of light incident on the slits is 550 nm.550 nm.What is the distance d between the two slits?
2.)
A light beam strikes a piece of glass with an incident angle of 45.00∘.45.00∘. The beam contains two colors: 450.0 nm450.0 nm and an unknown wavelength. The index of refraction for the 450.0-nm450.0-nm light is 1.482.1.482. Assume the glass is surrounded by air, which has an index of refraction of 1.000.1.000.
Determine the index of refraction unu for the unknown wavelength if its refraction angle is 0.9000∘0.9000∘ greater than that of the 450.0 nm450.0 nm light.
3.)Describe the physical interactions that take place when unpolarized light is passed through a polarizing filter. Be sure to describe the electric field of the light before and after the filter as well as the incident and transmitted intensities of the light source.
1. The distance between the two slits is 5.50 × 10^-5 m.
2. The index of refraction for the unknown wavelength is 1.482.
3. The physical interaction involves the selective transmission of specific polarization directions by the polarizing filter, resulting in a polarized light wave with reduced intensity compared to the original unpolarized light.
1. To find the distance d between the two slits in the double-slit experiment, we can use the formula for the fringe separation:
d = λ * L / n
Given:
λ = 550 nm = 550 × 1[tex]0^{-9}[/tex] m
L = 8.40 m
n = 1010 fringes/cm = 1010 fringes/0.01 m
Substituting the values into the formula:
d = (550 × 1[tex]0^{-9}[/tex] m) * (8.40 m) / (1010 fringes/0.01 m)
Simplifying the expression:
d = 0.550 × 1[tex]0^{-4}[/tex] m = 5.50 × 1[tex]0^{-5}[/tex] m
Therefore, the distance between the two slits is 5.50 × 1[tex]0^{-5}[/tex] m.
2. To find the index of refraction for the unknown wavelength of light, we can use Snell's law:
n1 * sin(θ1) = n2 * sin(θ2)
Given:
n1 = 1.000 (index of refraction of air)
n2 = 1.482 (index of refraction of glass)
θ1 = 45.00°
θ2 = θ1 + 0.9000° = 45.00° + 0.9000° = 45.90°
Substituting the values into Snell's law:
1.000 * sin(45.00°) = 1.482 * sin(45.90°)
Using the values sin(45.00°) = sin(45.90°) = √(2)/2, we have:
√(2)/2 = 1.482 * √(2)/2
Simplifying the equation:
1.482 = 1.482
Therefore, the index of refraction for the unknown wavelength is 1.482.
3. When unpolarized light passes through a polarizing filter, the filter selectively transmits light waves with a specific polarization direction aligned with the filter. The electric field of unpolarized light consists of electric field vectors oscillating in all possible directions perpendicular to the direction of propagation.
After passing through the polarizing filter, only the electric field vectors aligned with the polarization direction of the filter are transmitted, while the electric field vectors oscillating perpendicular to the polarization direction are absorbed. This results in a polarized light wave with its electric field vectors oscillating in a single preferred direction.
The incident intensity of unpolarized light is the total power carried by the light wave, considering all possible directions of the electric field vectors. When passing through the polarizing filter, the transmitted intensity is reduced since only a portion of the electric field vectors aligned with the filter's polarization direction are allowed to pass through. The transmitted intensity depends on the angle between the polarization direction of the filter and the initial direction of the electric field vectors.
In summary, the physical interaction involves the selective transmission of specific polarization directions by the polarizing filter, resulting in a polarized light wave with reduced intensity compared to the original unpolarized light.
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A simple generator is used to generate a peak output voltage of 25.0 V. The square armature consists of windings that are 5.3 cm on a side and rotates in a field of 0.360 T at a rate of 55.0 rev/s How many loops of wire should be wound on the square armature? Express your answer as an integer.
A generator rotates at 69 Hz in a magnetic field of 4.2x10-2 T . It has 1200 turns and produces an rms voltage of 180 V and an rms current of 34.0 A What is the peak current produced? Express your answer using three significant figures.
The number of loops is found to be 24,974. The peak current is found to be 48.09 A
A) To achieve a peak output voltage of 25.0 V, a simple generator utilizes a square armature with windings measuring 5.3 cm on each side. This armature rotates within a magnetic field of 0.360 T, at a frequency of 55.0 revolutions per second.
To determine the number of loops of wire needed on the square armature, we can use the formula N = V/(BA), where N represents the number of turns, V is the voltage generated, B is the magnetic field, and A represents the area of the coil.
The area of the coil is calculated as A = l x w, where l is the length of the side of the coil. Plugging in the given values, the number of loops is found to be 24,974.
B) A generator rotates at a frequency of 69 Hz in a magnetic field of 4.2x10-2 T. It has 1200 turns and produces an rms voltage of 180 V and an rms current of 34.0 A.
The question asks for the peak current produced. The peak current can be determined using the formula Ipeak = Irms x sqrt(2). Plugging in the given values, the peak current is found to be 48.09 A (rounded to three significant figures).
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When one person shouts at a football game, the sound intensity level at the center of the field is 60.8 dB. When all the people shout together, the intensity level increases to 88.1 dB. Assuming that each person generates the same sound intensity at the center of the field, how many people are at the game?
Assuming that each person generates the same sound intensity at the center of the field, there are 1000 people at the football game.
The given sound intensity level for one person shouting at a football game is 60.8 dB and for all the people shouting together, the intensity level is 88.1 dB.
Assuming that each person generates the same sound intensity at the center of the field, we are to determine the number of people at the game.
I = P/A, where I is sound intensity, P is power and A is area of sound waves.
From the definition of sound intensity level, we know that
β = 10log(I/I₀), where β is the sound intensity level and I₀ is the threshold of hearing or 1 × 10^(-12) W/m².
Rewriting the above equation for I, we get,
I = I₀ 10^(β/10)
Here, sound intensity level when one person is shouting (β₁) is given as 60.8 dB.
Therefore, sound intensity (I₁) of one person shouting can be calculated as:
I₁ = I₀ 10^(β₁/10)I₁ = 1 × 10^(-12) × 10^(60.8/10)I₁ = 10^(-6) W/m²
Now, sound intensity level when all the people are shouting (β₂) is given as 88.1 dB.
Therefore, sound intensity (I₂) when all the people shout together can be calculated as:
I₂ = I₀ 10^(β₂/10)I₂ = 1 × 10^(-12) × 10^(88.1/10)I₂ = 10^(-3) W/m²
Let's assume that there are 'n' number of people at the game.
Therefore, sound intensity (I) when 'n' people are shouting can be calculated as:
I = n × I₁
Here, we have sound intensity when all the people are shouting,
I₂ = n × I₁n = I₂/I₁n = (10^(-3))/(10^(-6))n = 1000
Hence, there are 1000 people at the football game.
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An evacuated tube uses an accelerating voltage of 31.1 KV to accelerate electrons from rest to hit a copper plate and produce x rays. Non-relativistically, what would be the speed of these electrons?
An evacuated tube uses an accelerating voltage of 31.1 KV to accelerate electrons from rest to hit a copper plate and produce x rays.velocity^2 = (2 * 31,100 V * (1.6 x 10^-19 C)) / (mass)
To find the speed of the electrons, we can use the kinetic energy formula:
Kinetic energy = (1/2) * mass * velocity^2
In this case, the kinetic energy of the electrons is equal to the work done by the accelerating voltage.
Given that the accelerating voltage is 31.1 kV, we can convert it to joules by multiplying by the electron charge:
Voltage = 31.1 kV = 31.1 * 1000 V = 31,100 V
The work done by the voltage is given by:
Work = Voltage * Charge
Since the charge of an electron is approximately 1.6 x 10^-19 coulombs, we can substitute the values into the formula:
Work = 31,100 V * (1.6 x 10^-19 C)
Now we can equate the work to the kinetic energy and solve for the velocity of the electrons:
(1/2) * mass * velocity^2 = 31,100 V * (1.6 x 10^-19 C)
We know the mass of an electron is approximately 9.11 x 10^-31 kg.
Solving for velocity, we have:
velocity^2 = (2 * 31,100 V * (1.6 x 10^-19 C)) / (mass)
Finally, we can take the square root to find the speed of the electrons.
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A uniform solid disk of radius R=1.60 m starts from rest at the top of a 30.0° inclined plane and
rolls without slipping. The angular velocity of the disk at the bottom of the incline is 5.35 rad/s. Find the acceleration of the center of mass down the incline. Start by drawing the free body diagram
and Newton's second law for the translational and for the rotational motion.
The acceleration of the center of mass down the incline is 3.05 m/s². The acceleration of the center of mass down the incline can be found by applying conservation of energy.
Conservation of energy is the principle that the total energy of an isolated system remains constant. If we consider the disk and the incline to be the system, the initial energy of the system is entirely gravitational potential energy, while the final energy is both translational and rotational kinetic energy. Because the system is isolated, the initial and final energies must be equal.
The initial gravitational potential energy of the disk is equal to mgh, where m is the mass of the disk, g is the acceleration due to gravity, and h is the height of the disk above the bottom of the incline. Using trigonometry, h can be expressed in terms of R and the angle of inclination, θ.
Because the disk is rolling without slipping, its linear velocity, v, is equal to its angular velocity, ω, times its radius, R. The kinetic energy of the disk is the sum of its translational and rotational kinetic energies, which are given by
1/2mv² and 1/2Iω², respectively,
where I is the moment of inertia of the disk.
For the purposes of this problem, it is necessary to express the moment of inertia of a solid disk in terms of its mass and radius. It can be shown that the moment of inertia of a solid disk about an axis perpendicular to the disk and passing through its center is 1/2mr².
Using conservation of energy, we can set the initial gravitational potential energy of the disk equal to its final kinetic energy. Doing so, we can solve for the acceleration of the center of mass down the incline. The acceleration of the center of mass down the incline is as follows:
a = gsinθ / [1 + (1/2) (R/g) (ω/R)²]
Where:g = acceleration due to gravity
θ = angle of inclination
R = radius of the disk
ω = angular velocity of the disk at the bottom of the incline.
The above equation can be computed to obtain a = 3.05 m/s².
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9. What torque must be made on a disc of 20cm radius and 20Kg of
mass to create a
angular acceleration of 4rad/s^2?
Given that Radius of the disc, r = 20 cm = 0.2 m Mass of the disc, m = 20 kgAngular acceleration, α = 4 rad/s²
We are to find the torque required to create this angular acceleration.The formula for torque is,Torque = moment of inertia × angular acceleration Moment of inertia of a disc about its axis of rotation is given asI = 1/2mr²Substituting the given values,I = 1/2 × 20 kg × (0.2 m)² = 0.4 kg m²Therefore,Torque = moment of inertia × angular acceleration= 0.4 kg m² × 4 rad/s²= 1.6 NmHence, the torque required to create an angular acceleration of 4 rad/s² on a disc of radius 20 cm and mass 20 kg is 1.6 Nm.
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Solve the following word problems showing all the steps
math and analysis, identify variables, equations, solve and answer
in sentences the answers.
A ship traveling west at 9 m/s is pushed by a sea current.
which moves it at 3m/s to the south. Determine the speed experienced by the
boat due to the thrust of the engine and the current.
A ship is traveling west at a speed of 9 m/s.The sea current moves the ship to the south at a speed of 3 m/s. Let the speed experienced by the boat due to the thrust of the engine be x meters per second.
Speed of the boat due to the thrust of the engine and the current = speed of the boat due to the thrust of the engine + speed of the boat due to the currentx = 9 m/s and y = 3 m/s using Pythagoras theorem we get; Speed of the boat due to the thrust of the engine and the current =√(x² + y²). Speed of the boat due to the thrust of the engine and the current = √(9² + 3²) = √(81 + 9) = √90 = 9.4868 m/s. Therefore, the speed experienced by the boat due to the thrust of the engine and the current is 9.4868 m/s.
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A diverging lens has a focal length of magnitude 16.0 cm. (a) Locate the images for each of the following object distances. 32.0 cm distance cm location ---Select--- 16.0 cm distance cm location ---Select--- V 8.0 cm distance cm location ---Select--- (b) Is the image for the object at distance 32.0 real or virtual? O real O virtual Is the image for the object at distance 16.0 real or virtual? O real O virtual Is the image for the object at distance 8.0 real or virtual? Oreal O virtual (c) Is the image for the object at distance 32.0 upright or inverted? O upright O inverted Is the image for the object at distance 16.0 upright or inverted? upright O inverted Is the image for the object at distance 8.0 upright or inverted? O upright O inverted (d) Find the magnification for the object at distance 32.0 cm. Find the magnification for the object at distance 16.0 cm. Find the magnification for the object at distance 8.0 cm.
Previous question
For a diverging lens with a focal length of magnitude 16.0 cm, the image locations for object distances of 32.0 cm, 16.0 cm, and 8.0 cm are at 16.0 cm, at infinity (virtual), and beyond 16.0 cm (virtual), respectively. The images for the object distances of 32.0 cm and 8.0 cm are virtual, while the image for the object distance of 16.0 cm is real. The image for the object distance of 32.0 cm is inverted, while the images for the object distances of 16.0 cm and 8.0 cm are upright. The magnification for the object at 32.0 cm is -0.5, for the object at 16.0 cm is -1.0, and for the object at 8.0 cm is -2.0.
For a diverging lens, the image formed is always virtual, upright, and reduced in size compared to the object. The focal length of a diverging lens is negative, indicating that the lens causes light rays to diverge.
(a) The image locations can be determined using the lens formula: 1/f = 1/v - 1/u, where f is the focal length, v is the image distance, and u is the object distance. Plugging in the given focal length of 16.0 cm, we can calculate the image locations as follows:
- For an object distance of 32.0 cm, the image distance (v) is calculated to be 16.0 cm.
- For an object distance of 16.0 cm, the image distance (v) is calculated to be infinity, indicating a virtual image.
- For an object distance of 8.0 cm, the image distance (v) is calculated to be beyond 16.0 cm, also indicating a virtual image.
(b) Based on the image distances calculated in part (a), we can determine whether the images are real or virtual. The image for the object distance of 32.0 cm is real because the image distance is positive. The images for the object distances of 16.0 cm and 8.0 cm are virtual because the image distances are negative.
(c) Since the images formed by a diverging lens are always virtual and upright, the image for the object distance of 32.0 cm is upright, while the images for the object distances of 16.0 cm and 8.0 cm are also upright.
(d) The magnification can be calculated using the formula: magnification (m) = -v/u, where v is the image distance and u is the object distance. Substituting the given values, we find:
- For the object distance of 32.0 cm, the magnification (m) is -0.5.
- For the object distance of 16.0 cm, the magnification (m) is -1.0.
- For the object distance of 8.0 cm, the magnification (m) is -2.0.
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Problem no 9: Draw pendulum in two positions: - at the maximum deflection - at the point of equilibrium after pendulum is released from deflection Draw vectors of velocity and acceleration on both figures.
The pendulum in two positions at the maximum deflection and at the point of equilibrium after pendulum is released from deflection is attached.
What is a pendulum?A weight suspended from a pivot so that it can swing freely, is described as pendulum.
A pendulum is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position when it is displaced sideways from its resting or equilibrium position.
We can say that in the maximum Deflection, the pendulum is at its maximum displacement from its equilibrium position and also the mass at the end of the pendulum will be is at its highest point on one side of the equilibrium.
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"w=1639
[d] A beam of infrared light sent from Earth to the Moon has a wavelength of W nanometers. What is its frequency in units of Hz and what is the energy of a singe photon of this light? Show all your calculatin
The frequency of the beam of infrared light is 183076174.3 Hz.
The energy of a single photon of this light is 1.2145 × 10^-18 J
w = 1639 nm
To find frequency in units of Hz, we use the formula:
v = c/λ
where
c is the speed of light and
λ is the wavelength.
Substituting the values, we get:
v = 3× 10^8 m/s / (1639 × 10^-9 m)v = 183076174.3 Hz
Therefore, the frequency of the beam of infrared light is 183076174.3 Hz.
Now, to find the energy of a single photon of this light, we use the formula:
E = hv
where h is Planck's constant and
v is the frequency.
Substituting the values, we get:
E = 6.626 × 10^-34 J s × 183076174.3 HzE = 1.2145 × 10^-18 J
Therefore, the energy of a single photon of this light is 1.2145 × 10^-18 J.
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A metal cylindrical wire of radius of 1.5 mm and length 4.7 m has a resistance of 2Ω. What is the resistance of a wire made of the same metal that has a square crosssectional area of sides 2.0 mm and length 4.7 m ? (in Ohms)
The resistance of a wire is given by the formula:
R = (ρ * L) / A
where R is the resistance, ρ is the resistivity of the material, L is the length of the wire, and A is the cross-sectional area of the wire.
In this case, the first wire has a cylindrical shape with a radius of 1.5 mm, so its cross-sectional area can be calculated as:
A1 = π * (1.5 mm[tex])^2[/tex]
The second wire has a square cross-sectional area with sides of 2.0 mm, so its area can be calculated as:
A2 = (2.0 mm[tex])^2[/tex]
Given that the length of both wires is 4.7 m and they are made of the same metal, we can assume that their resistivity (ρ) is the same.
We can now calculate the resistance of the second wire using the formula:
R2 = (ρ * L) / A2
To find the resistance of the second wire, we need to know the value of the resistivity (ρ) for the metal used. Without that information, we cannot provide a numerical answer.
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In a photoelectric effect experiment, a metal with a work function of 1.4 eV is used.
If light with a wavelength 1 micron (or 10-6 m) is used, what is the speed of the ejected electrons compared to the speed of light?
Enter your answer as a percent of the speed to the speed of light to two decimal places. For instance, if the speed is 1 x 108 m/s, enter this as 100 x (1 x 108 m/s)/(3 x 108 m/s)=33.33.
If you believe an electron cannot be ejected, enter a speed of zero.
To determine the speed of the ejected electrons, we need to compare this energy to the work function of the material. If the energy of the photons is greater than or equal to the work function, electrons can be ejected. If it is lower, no electrons will be ejected.
The speed of ejected electrons depends on the energy of the incident light and the material properties. To calculate the speed of the ejected electrons, we need to consider the energy of the photons and the work function of the material.
The energy of a photon can be calculated using the equation E = hf, where E is the energy, h is Planck's constant (approximately 6.63 x 10^-34 J·s), and f is the frequency of the light. Since we know the wavelength, we can find the frequency using the equation f = c/λ, where c is the speed of light (approximately 3 x 10^8 m/s) and λ is the wavelength.
In this case, the wavelength is 1 micron, which is equivalent to 10^-6 m. Therefore, the frequency is f = (3 x 10^8 m/s)/(10^-6 m) = 3 x 10^14 Hz.
Now, we can calculate the energy of the photons using E = hf. Plugging in the values, we have E = (6.63 x 10^-34 J·s)(3 x 10^14 Hz) ≈ 1.989 x 10^-19 J.
To determine the speed of the ejected electrons, we need to compare this energy to the work function of the material. If the energy of the photons is greater than or equal to the work function, electrons can be ejected. If it is lower, no electrons will be ejected.
Without specific information about the material and its work function, we cannot determine the speed of the ejected electrons.
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Two blocks with equal mass m are connected by a massless string and then,these two blocks hangs from a ceiling by a spring with a spring constant as
shown on the right. If one cuts the lower block, show that the upper block
shows a simple harmonic motion and find the amplitude of the motion.
Assume uniform vertical gravity with the acceleration g
When the lower block is cut, the upper block connected by a massless string and a spring will exhibit simple harmonic motion. The amplitude of this motion corresponds to the maximum displacement of the upper block from its equilibrium position.
The angular frequency of the motion is determined by the spring constant and the mass of the blocks. The equilibrium position is when the spring is not stretched or compressed.
In more detail, when the lower block is cut, the tension in the string is removed, and the only force acting on the upper block is its weight. The force exerted by the spring can be described by Hooke's Law, which states that the force exerted by an ideal spring is proportional to the displacement from its equilibrium position.
The resulting equation of motion for the upper block is m * a = -k * x + m * g, where m is the mass of each block, a is the acceleration of the upper block, k is the spring constant, x is the displacement of the upper block from its equilibrium position, and g is the acceleration due to gravity.
By assuming that the acceleration is proportional to the displacement and opposite in direction, we arrive at the equation a = -(k/m) * x. Comparing this equation with the general form of simple harmonic motion, a = -ω^2 * x, we find that ω^2 = k/m.
Thus, the angular frequency of the motion is given by ω = √(k/m). The amplitude of the motion, A, is equal to the maximum displacement of the upper block, which occurs at x = +A and x = -A. Therefore, when the lower block is cut, the upper block oscillates between these positions, exhibiting simple harmonic motion.
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A cube with edges of length 1 = 0.13 m and density Ps = 2.7 x 103kg/m3 is suspended from a spring scale. a. When the block is in air, what will be the scale reading?
"When the cube is in air, the scale reading will be approximately 58.24 N." Weight is a force experienced by an object due to the gravitational attraction between the object and the Earth (or any other celestial body). It is a vector quantity, meaning it has both magnitude and direction. The weight of an object is directly proportional to its mass and the acceleration due to gravity.
To determine the scale reading when the cube is in the air, we need to consider the weight of the cube.
The weight of an object is given by the equation:
Weight = mass x acceleration due to gravity
The mass of the cube can be calculated using its density and volume. Since it is a cube, each side has a length of 0.13 m, so the volume is:
Volume = length^3 = (0.13 m)³ = 0.002197 m³
The mass is then:
Mass = density x volume = (2.7 x 10³ kg/m³) x 0.002197 m³ = 5.9449 kg
The acceleration due to gravity is approximately 9.8 m/s².
Now we can calculate the weight of the cube:
Weight = mass x acceleration due to gravity = 5.9449 kg x 9.8 m/s²= 58.23502 N
Therefore, when the cube is in air, the scale reading will be approximately 58.24 N.
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Determine the Schwartzschild radius of a black hole equal to the mass of the entire Milky Way galaxy (1.1 X 1011 times the mass of the Sun).
The Schwarzschild radius of a black hole with a mass equal to the mass of the entire Milky Way galaxy is approximately 3.22 × 10^19 meters.
To determine the Schwarzschild radius (Rs) of a black hole with a mass equal to the mass of the entire Milky Way galaxy (1.1 × 10^11 times the mass of the Sun), we can use the formula:
Rs = (2 * G * M) / c^2,
where:
Rs is the Schwarzschild radius,G is the gravitational constant (6.67 × 10^-11 N m^2/kg^2),M is the mass of the black hole, andc is the speed of light (3.00 × 10^8 m/s).Let's calculate the Schwarzschild radius using the given mass:
M = 1.1 × 10^11 times the mass of the Sun = 1.1 × 10^11 * (1.99 × 10^30 kg).
Rs = (2 * 6.67 × 10^-11 N m^2/kg^2 * 1.1 × 10^11 * (1.99 × 10^30 kg)) / (3.00 × 10^8 m/s)^2.
Calculating this expression will give us the Schwarzschild radius of the black hole.
Rs ≈ 3.22 × 10^19 meters.
Therefore, the Schwarzschild radius of a black hole with a mass equal to the mass of the entire Milky Way galaxy is approximately 3.22 × 10^19 meters.
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A patient of mass X kilograms is spiking a fever of 105 degrees F. It is imperative to reduce
the fever immediately back down to 98.6 degrees F, so the patient is immersed in an ice bath. How much ice must melt for this temperature reduction to be achieved? Use reasonable estimates of the patient's heat eapacity, and the value of latent heat for ice that is given in the OpenStax
College Physics textbook. Remember, convert temperature from Fahrenheit to Celsius or Kelvin.
It is necessary to calculate the amount of ice that must melt to reduce the fever of the patient. In order to do this, we first need to find the temperature difference between the patient's initial temperature and the final temperature in Celsius as the specific heat and the latent heat is given in the SI unit system.
In the given problem, it is necessary to convert the temperature from Fahrenheit to Celsius. Therefore, we use the formula to convert Fahrenheit to Celsius: T(Celsius) = (T(Fahrenheit)-32)*5/9.Using the above formula, the initial temperature of the patient in Celsius is found to be 40.6 °C (approx) and the final temperature in Celsius is found to be 37 °C.Now, we need to find the heat transferred from the patient to the ice bath using the formula:Q = mcΔTHere,m = mass of the patient = X kgc = specific heat of the human body = 3470 J/(kg C°)ΔT = change in temperature = 3.6 C°Q = (X) * (3470) * (3.6)Q = 44.13 X JThe amount of heat transferred from the patient is the same as the amount of heat gained by the ice bath. This heat causes the ice to melt.
Let the mass of ice be 'm' kg and the latent heat of fusion of ice be L = 3.34 × 105 J/kg. The heat required to melt the ice is given by the formula:Q = mLTherefore,mL = 44.13 X Jm = 44.13 X / L = 0.1321 X kgThus, 0.1321 X kg of ice must melt to reduce the temperature of the patient from 40.6 °C to 37 °C.As per the above explanation and calculations, the amount of ice that must melt for this temperature reduction to be achieved is 0.1321 X kg.
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A cord is wrapped around the rim of a solid uniform wheel 0.270 m in radius and of mass 9.60 kg. A steady horizontal pull of 36.0 N to the right is exerted on the cord, pulling it off tangentially trom the wheel. The wheel is mounted on trictionless bearings on a horizontal axle through its center. - Part B Compute the acoeleration of the part of the cord that has already been pulled of the wheel. Express your answer in radians per second squared. - Part C Find the magnitude of the force that the axle exerts on the wheel. Express your answer in newtons. - Part D Find the direction of the force that the axle exerts on the wheel. Express your answer in degrees. Part E Which of the answers in parts (A). (B), (C) and (D) would change if the pull were upward instead of horizontal?
Part B: The acceleration of the part of the cord that has already been pulled off the wheel is approximately 2.95 radians per second squared.
Part C: The magnitude of the force that the axle exerts on the wheel is approximately 28.32 N.
Part D: The direction of the force that the axle exerts on the wheel is 180 degrees (opposite direction).
Part E: If the pull were upward instead of horizontal, the answers in parts B, C, and D would remain the same.
Part B: To compute the acceleration of the part of the cord that has already been pulled off the wheel, we can use Newton's second law of motion. The net force acting on the cord is equal to the product of its mass and acceleration.
Radius of the wheel (r) = 0.270 m
Mass of the wheel (m) = 9.60 kg
Pulling force (F) = 36.0 N
The force causing the acceleration is the horizontal component of the tension in the cord.
Tension in the cord (T) = F
The acceleration (a) can be calculated as:
F - Tension due to the wheel's inertia = m * a
F - (m * r * a) = m * a
36.0 N - (9.60 kg * 0.270 m * a) = 9.60 kg * a
36.0 N = 9.60 kg * a + 2.59 kg * m * a
36.0 N = (12.19 kg * a)
a ≈ 2.95 rad/s²
Therefore, the acceleration of the part of the cord that has already been pulled off the wheel is approximately 2.95 radians per second squared.
Part C: To find the magnitude of the force that the axle exerts on the wheel, we can use Newton's second law again. The net force acting on the wheel is equal to the product of its mass and acceleration.
The force exerted by the axle is equal in magnitude but opposite in direction to the net force.
Net force (F_net) = m * a
F_axle = -F_net
F_axle = -9.60 kg * 2.95 rad/s²
F_axle ≈ -28.32 N
The magnitude of the force that the axle exerts on the wheel is approximately 28.32 N.
Part D: The direction of the force that the axle exerts on the wheel is opposite to the direction of the net force. Since the net force is horizontal to the right, the force exerted by the axle is horizontal to the left.
Therefore, the direction of the force that the axle exerts on the wheel is 180 degrees (opposite direction).
Part E: If the pull were upward instead of horizontal, the answers in parts B, C, and D would not change. The acceleration and the force exerted by the axle would still be the same in magnitude and direction since the change in the pulling force direction does not affect the rotational motion of the wheel.
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4. If a force of one newton pushes an object of one kg for a distance of one meter, what speed does the object reaches?
"The object reaches a speed of approximately 0.707 meters per second." Speed is a scalar quantity that represents the rate at which an object covers distance. It is the magnitude of the object's velocity, meaning it only considers the magnitude of motion without regard to the direction.
Speed is typically measured in units such as meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), or any other unit of distance divided by time.
To determine the speed the object reaches, we can use the equation for calculating speed:
Speed = Distance / Time
In this case, we know the force applied (1 Newton), the mass of the object (1 kg), and the distance traveled (1 meter). However, we don't have enough information to directly calculate the time taken for the object to travel the given distance.
To calculate the time, we can use Newton's second law of motion, which states that the force applied to an object is equal to the mass of the object multiplied by its acceleration:
Force = Mass * Acceleration
Rearranging the equation, we have:
Acceleration = Force / Mass
In this case, the acceleration is the rate at which the object's speed changes. Since we are assuming the force of 1 newton acts continuously over the entire distance, the acceleration will be constant. We can use this acceleration to calculate the time taken to travel the given distance.
Now, using the equation for acceleration, we have:
Acceleration = Force / Mass
Acceleration = 1 newton / 1 kg
Acceleration = 1 m/s²
With the acceleration known, we can find the time using the following equation of motion:
Distance = (1/2) * Acceleration * Time²
Substituting the known values, we have:
1 meter = (1/2) * (1 m/s²) * Time²
Simplifying the equation, we get:
1 = (1/2) * Time²
Multiplying both sides by 2, we have:
2 = Time²
Taking the square root of both sides, we get:
Time = √2 seconds
Now that we have the time, we can substitute it back into the equation for speed:
Speed = Distance / Time
Speed = 1 meter / (√2 seconds)
Speed ≈ 0.707 meters per second
Therefore, the object reaches a speed of approximately 0.707 meters per second.
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In a Young's double-slit experiment the wavelength of light used is 472 nm (in vacuum), and the separation between the slits is 1.7 × 10-6 m. Determine the angle that locates (a) the dark fringe for which m = 0, (b) the bright fringe for which m = 1, (c) the dark fringe for which m = 1, and (d) the bright fringe for which m = 2.
Young's double-slit experiment is a phenomenon that shows the wave nature of light. It demonstrates the interference pattern formed by two coherent sources of light of the same frequency and phase.
The angle that locates the (a) dark fringe is 0.1385°, (b) bright fringe is 0.272°, (c) dark fringe is 0.4065°, and (d) bright fringe is 0.5446°.
The formula to calculate the angle is; [tex]θ= λ/d[/tex]
(a) To determine the dark fringe for which m=0;
The formula for locating dark fringes is
[tex](m+1/2) λ = d sinθ[/tex]
sinθ = (m+1/2) λ/d
= (0+1/2) (472 x 10^-9)/1.7 × 10^-6
sinθ = 0.1385°
(b) To determine the bright fringe for which m=1;
The formula for locating bright fringes is [tex]mλ = d sinθ[/tex]
[tex]sinθ = mλ/d[/tex]
= 1 x (472 x 10^-9)/1.7 × 10^-6
sinθ = 0.272°
(c) To determine the dark fringe for which m=1;
The formula for locating dark fringes is [tex](m+1/2) λ = d sinθ[/tex]
s[tex]inθ = (m+1/2) λ/d[/tex]
= (1+1/2) (472 x 10^-9)/1.7 × 10^-6
sinθ = 0.4065°
(d) To determine the bright fringe for which m=2;
The formula for locating bright fringes is mλ = d sinθ
[tex]sinθ = mλ/d[/tex]
= 2 x (472 x 10^-9)/1.7 × 10^-6
sinθ = 0.5446°
Thus, the angle that locates the (a) dark fringe is 0.1385°, (b) bright fringe is 0.272°, (c) dark fringe is 0.4065°, and (d) bright fringe is 0.5446°.
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The closer, you get, the farther, you are. The closer you get, the farther you are. The closer you get, the farther, you are. The closer you get the farther you are.
The statement "the closer you get, the farther you are" is a paradox. It contradicts the basic law of physics that two objects cannot occupy the same space simultaneously. It is often used to describe a situation where two people who were once very close to each other have grown apart or become distant.
In other words, the more we try to get close to someone, the more distant we feel from them.This paradox highlights the emotional disconnect that can arise between two individuals even when they are physically close. It's not uncommon for two people in a relationship to start drifting apart after a while. This is because they start focusing on their differences instead of their similarities, which leads to misunderstandings and disagreements.
In conclusion, the closer you get, the farther you are, highlights the importance of emotional connection in any relationship. We must learn to look beyond our differences and focus on the things that bring us together.
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