A larger objective lens allows more light to enter, reducing the effects of diffraction, and increasing angular resolution, resulting in a sharper image.
The primary factor that contributes to a telescope's bigger objective lens producing a sharper image than a telescope with a smaller objective lens is that the larger objective lens enables more light to enter the telescope, which minimises the effects of diffraction. The image becomes blurry and loses information due to diffraction, especially at high magnifications.
A bigger objective lens's enhanced capacity for light collection also enables a higher signal-to-noise ratio, which produces a picture with more clarity and contrast. Last but not least, a bigger objective lens can accommodate a higher angular resolution, enabling the picture to resolve more information.
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The correct question will be: What are the three main advantages of a telescope with a bigger objective lens compared to one with a smaller objective lens?
at what speed, as a fraction of c , will a moving rod have a length 95% that of an identical rod at rest?
The moving rod will have a length 95% that of an identical rod at rest when it is traveling at approximately 31.2% the speed of light.
"c" represents the speed of light. The phenomenon you are describing is called length contraction, which occurs when an object is moving at a significant fraction of the speed of light.
According to the theory of special relativity, the length of the moving rod, L, will appear shorter than its length at rest, L₀, as observed from a stationary frame of reference. The equation for length contraction is:
L = L₀ * √(1 - v²/c²)
where L is the length of the moving rod, L₀ is the length of the rod at rest, v is the velocity of the moving rod, and c is the speed of light.
The moving rod has a length 95% that of the rod at rest. Therefore, we can set up the equation as:
0.95 * L₀ = L₀ * √(1 - v²/c²)
To solve for v, divide both sides by L₀ and then square both sides:
0.95² = 1 - v²/c²
Rearrange the equation and solve for v/c:
v/c = √(1 - 0.95²)
v/c ≈ 0.312
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what happens to each bulb if the switch is closed? match the words in the left column to the appropriate blanks in the sentences on the right. resethelp once the switch is closed, the current flows blankbecau
When the switch is closed, the circuit is completed, and the current starts flowing. The behavior of each bulb depends on the arrangement of the bulbs and the switch in the circuit.
If the bulbs are arranged in a series circuit, the current flows through both bulbs in the same direction. In this case, the voltage across each bulb is proportional to its resistance. Therefore, if the bulbs have the same resistance, they will have the same voltage across them. If one bulb has a higher resistance than the other, it will have a higher voltage across it. The current flowing through both bulbs will be the same, but the voltage across them will differ.
If the bulbs are arranged in a parallel circuit, the current splits into different branches and each branch contains a bulb. In this case, the voltage across each bulb is the same, and the current flowing through each bulb is proportional to its resistance. Therefore, if one bulb has a higher resistance than the other, it will have a lower current flowing through it. If one bulb has a lower resistance than the other, it will have a higher current flowing through it. The voltage across both bulbs stays the same, and no other bulb becomes short-circuited.
In conclusion, the behavior of each bulb depends on the arrangement of the circuit. If the bulbs are arranged in a series circuit, the voltage across them differs, and the current flowing through them is the same. If the bulbs are arranged in a parallel circuit, the voltage across them is the same, and the current flowing through them differs.
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Complete question:
What happens to each bulb if the switch is closed? Match the words in the left column to the appropriate blanks in the sentences on the right. Res through both bulbs Once the switch is closed, the current flows because only through bulb A only through bulb B the voltage across it becomes zero the voltages across them stay the same another bulb becomes short-circuited no branch of a circuit is opened.
A baseball of mass 0.3 kg and a tennis ball of mass 0.5 kg possess equal momentum. What is the velocity of tennis ball if the baseball is moving at 21 ms ¹?
please help answer all A through D will give 100 points
Entropy has some interesting properties. Calculate the change in entropy for the following situations. For these small temperature changes, you can use the original temperature to find the changes in entropy.
A: Heating 1.0 kg of water from 272 K to 274 K.
B:Heating 1.0 kg of water from 353 K to 354 K.
C:Heating 1.0 kg of lead from 273 K to 274 K.
D:Completely melting 1.0 kg of ice at 273 K.
The changes in entropy are: A) 30.8 J/K, B) 11.8 J/K, C) 0.47 J/K and D) 1223 J/K
What is entropy?
Entropy is a thermodynamic quantity that describes the degree of disorder or randomness in a system. It is a measure of the number of possible arrangements or microstates that a system can have, given its macroscopic properties like temperature, pressure, and volume.
The change in entropy can be calculated using the following formula:
ΔS = Q/T
Where ΔS is the change in entropy, Q is the heat absorbed or released, and T is the temperature in Kelvin.
A) Heating 1.0 kg of water from 272 K to 274 K:
The specific heat capacity of water is 4.184 J/(g·K), so the heat absorbed can be calculated as follows:
Q = m × c × ΔT
Q = 1000 g × 4.184 J/(g·K) × (274 K - 272 K)
Q = 8,368 J
The change in entropy is:
ΔS = Q/T
ΔS = 8,368 J / 272 K
ΔS = 30.8 J/K
B) Heating 1.0 kg of water from 353 K to 354 K:
Using the same formula as before:
Q = m × c × ΔT
Q = 1000 g × 4.184 J/(g·K) × (354 K - 353 K)
Q = 4,184 J
The change in entropy is:
ΔS = Q/T
ΔS = 4,184 J / 353 K
ΔS = 11.8 J/K
C) Heating 1.0 kg of lead from 273 K to 274 K:
The specific heat capacity of lead is 0.128 J/(g·K), so the heat absorbed can be calculated as follows:
Q = m × c × ΔT
Q = 1000 g × 0.128 J/(g·K) × (274 K - 273 K)
Q = 128 J
The change in entropy is:
ΔS = Q/T
ΔS = 128 J / 273 K
ΔS = 0.47 J/K
D) Completely melting 1.0 kg of ice at 273 K:
The heat of fusion of ice is 333.55 J/g, so the heat absorbed can be calculated as follows:
Q = m × ΔH
Q = 1000 g × 333.55 J/g
Q = 333,550 J
The change in entropy is:
ΔS = Q/T
ΔS = 333,550 J / 273 K
ΔS = 1223 J/K
Therefore, the changes in entropy are:
A) 30.8 J/K
B) 11.8 J/K
C) 0.47 J/K
D) 1223 J/K
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two 7493 counters, configured to count 0 to f, are connected so that the q3 output of one ic is wired to the cp0 clock input of the other ic. cp1 of each is fed from its q0 output. what is the modulus of the total circuit?
The total circuit will have a modulus of 256.
What is the total modulus of the circuit when two 7493 counters?The 7493 is a binary counter that can count from 0 to 15 in binary (or 0 to F in hexadecimal). When two 7493 counters are connected in this way, the Q3 output of the first counter is connected to the CP0 input of the second counter. This means that when the first counter reaches a count of 8 (1000 in binary), it will send a clock pulse to the second counter, causing it to count up by one. The CP1 input of each counter is connected to the Q0 output of the same counter, which means that the counters will count in a loop from 0 to F (or 15) and then back to 0. The modulus of the total circuit is the maximum count that it can reach, which is 16 in this case. Therefore, the modulus of the total circuit will be 256.
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what are planetary rings made of, and how do they differ among the four jovian planets? match the terms in the left column to the appropriate blanks in the sentences on the right. resethelp planetary rings are made up of countless small particles composed of blank and blank.target 1 of 10target 2 of 10 all rings lie in the blank. rings' particles have blank orbits.target 3 of 10target 4 of 10 blank's rings are the brightest and widest among jovian planets. their particles consist most of blank.target 5 of 10target 6 of 10 blank's rings are mostly dusty and less visible.target 7 of 10 blank and blank both have narrow bright rings diveded by very sparse dusty rings in between.target 8 of 10target 9 of 10 blank's narrow rings show irregularities in form of brighter arcs, as if the rings were incomplete
Numerous tiny ice and rock fragments make up the planet's ring system. The four jovian planets differ from one another in terms of colour and shape.
All rings lie in the planet's equatorial plane. Jupiter's rings are the brightest and widest among jovian planets. Their particles consist mostly of small, dark rock fragments. Saturn's rings are mostly dusty and less visible. Uranus and Neptune both have narrow bright rings divided by very sparse dusty rings in between. Uranus's narrow rings show irregularities in the form of brighter arcs, as if the rings were incomplete.
Planetary rings are made up of countless small particles composed of ice and rock. All rings lie in the equatorial plane. Rings' particles have elliptical orbits. Saturn's rings are the brightest and widest among jovian planets. Their particles consist mostly of ice. Jupiter's rings are mostly dusty and less visible. Uranus and Neptune both have narrow bright rings divided by very sparse dusty rings in between. Neptune's narrow rings show irregularities in the form of brighter arcs, as if the rings were incomplete.
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if a sound wave transitions from one medium to another, which transition would result in a shortening of the wavelength of the sound wave?
If a sound wave transitions from one medium to another, a transition from a medium with a higher speed of sound to a medium with a lower speed of sound would result in a shortening of the wavelength of the sound wave.
1. When a sound wave enters a new medium, its frequency remains constant.
2. The speed of sound depends on the properties of the medium (e.g., density, elasticity).
3. The wavelength of the sound wave can be calculated using the formula: wavelength = speed of sound / frequency.
4. When the speed of sound is higher in the first medium and lower in the second medium, the wavelength will decrease according to the formula since the frequency is constant.
So, a transition from a medium with a higher speed of sound to a medium with a lower speed of sound would cause the wavelength of the sound wave to shorten.
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A sound wave transitioning from a medium with a higher speed of sound to a medium with a lower speed of sound will result in a shortening of the wavelength.
When a sound wave transitions from a medium with a higher speed of sound to a medium with a lower speed of sound, the wavelength of the sound wave will shorten.
Step-by-step explanation:
1. A sound wave is an oscillation of pressure that propagates through a medium.
2. The transition occurs when the sound wave moves from one medium to another.
3. The speed of sound in each medium depends on the medium's properties (density, elasticity, etc.).
4. If the sound wave moves from a medium with a higher speed of sound to a medium with a lower speed of sound, the wavelength will shorten.
5. This shortening occurs because the wave's frequency remains constant, and since the speed of sound has decreased, the wavelength must also decrease to maintain the relationship: speed = wavelength × frequency.
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the magnetic force per meter on a wire is measured to be only 55% of its maximum possible value. what is the angle between the wire and the magnetic field?
The angle between the wire and the magnetic field is approximately 33.6 degrees.
To find the angle between the wire and the magnetic field, we will use the following formula for the magnetic force per meter on a wire:
F = BIL sin(θ)
where F is the magnetic force per meter, B is the magnetic field strength, I is the current flowing through the wire, L is the length of the wire, and θ is the angle between the wire and the magnetic field.
Given that the magnetic force is only 55% of its maximum possible value, we can write the equation as:
0.55 * F_max = BIL sin(θ)
The maximum force occurs when sin(θ) = 1, which means:
F_max = BIL
Now, we can substitute F_max back into our first equation:
0.55 * BIL = BIL sin(θ)
Now, divide both sides by BIL:
0.55 = sin(θ)
Finally, to find the angle θ, take the inverse sine (sin^(-1)) of both sides:
θ = sin^(-1)(0.55)
θ ≈ 33.6 degrees
So approximately 33.6 degrees is the angle between the wire and the magnetic field.
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Our Sun is about one thousand times as massive as Jupiter. Let Object 1 be the Sun and Object 2 be Jupiter. Then m1 ≈ 1,000m2. Also, let R stand for the total distance between them (R = d1 + d2). What of the following statements must be true?
One statement that must be true is that the gravitational force exerted by the Sun on Jupiter is much greater than the force exerted by Jupiter on the Sun.
This is because the force of gravity between two objects is directly proportional to the masses of the objects and inversely proportional to the square of the distance between them. In this case, the mass of the Sun is much greater than the mass of Jupiter, so the force exerted by the Sun is much stronger.
Additionally, the distance between the Sun and Jupiter is relatively large compared to the size of the objects themselves, so the force of gravity is further weakened. This is why Jupiter orbits the Sun, rather than the other way around.
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Calculate a 5.0 kg ball on the end of a chain is whirled at a constant speed of 1.0 m/s in a horizontal circle of radius 3.0 m. What is the work done by the centripetal force during one revolution?
The work done by the centripetal force during one revolution is 31.5 J.
To find the work done by the centripetal force during one revolution, we can use the formula:
W = Fc × d
where W is the work done, Fc is the centripetal force, and d is the distance traveled in one revolution.
First, we need to find the centripetal force. We can use the formula:
[tex]Fc = mv^2 / r[/tex]
where m is the mass of the ball, v is its speed, and r is the radius of the circle.
Plugging in the values we get:
[tex]Fc = (5.0 kg) × (1.0 m/s)^2 / 3.0 m[/tex]
Fc = 1.67 N
Next, we need to find the distance traveled in one revolution. The circumference of the circle is:
C = 2πr = 2π(3.0 m) = 18.85 m
So the distance traveled in one revolution is equal to the circumferenc
d = 18.85 m
Now we can calculate the work done by the centripetal force:
W = Fc × d
W = (1.67 N) × (18.85 m)
W = 31.5 J
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Hello! I'd be happy to help you with this problem. Here's a step-by-step explanation using the terms "speed," "radius," "work done," and "centripetal force":
1. First, we need to find the centripetal force acting on the 5.0 kg ball. The formula for centripetal force (F_c) is:
F_c = (m * v^2) / r
where m = mass (5.0 kg), v = speed (1.0 m/s), and r = radius (3.0 m).
2. Plug the values into the formula:
F_c = (5.0 kg * (1.0 m/s)^2) / 3.0 m
F_c = (5.0 kg * 1.0 m^2/s^2) / 3.0 m
F_c = 5.0 N
3. Now, we need to find the work done (W) by the centripetal force during one revolution. In this case, the work done is zero because the force acts perpendicular to the displacement of the ball, and the angle between the force and displacement is 90 degrees.
For work done, the formula is:
W = F_c * d * cos(theta)
where d is the displacement and theta is the angle between the force and displacement.
4. Since the angle (theta) is 90 degrees, cos(theta) = 0. Therefore,
W = 5.0 N * d * 0
W = 0 J (Joules)
So, the work done by the centripetal force during one revolution is 0 Joules.
the loudness of sound, measured in decibels (db), is calculated using the formula , where l is the loudness, and i is the intensity of the sound.what is the intensity of a fire alarm that measures 125db loud? round your answer to the nearest hundredth.intensity
The intensity of the fire alarm that measures 125 dB loud is approximately 3.16 W/[tex]m^{2}[/tex].
To calculate the intensity (I) of a fire alarm that measures 125 dB loud, we need to use the formula for loudness (L):
L = 10 * log10(I / Io)
In this formula, L is the loudness (in dB), I is the intensity of the sound, and Io is the reference intensity ([tex]10^{-12}[/tex] W/[tex]m^{2}[/tex]). We are given L = 125 dB and we want to find I. First, we need to rearrange the formula to solve for I:
I = Io *[tex]10^{L/10}[/tex]
Now, plug in the given values:
I = 10^-12 *[tex]10^{125/10}[/tex]
I = 10^-12 * [tex]10^{12.5}[/tex]
I ≈ 3.16 W/[tex]m^{2}[/tex]
The intensity of the fire alarm that measures 125 dB loud is approximately 3.16 W/[tex]m^{2}[/tex]
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hydrolysis is more common in a(n) _____ climate
Hydrolysis is a chemical reaction in which water is used to break down complex molecules into simpler ones.
This process is more common in a humid or wet climate. In such climates, water is readily available and tends to accumulate in soils and rocks, leading to the formation of aqueous solutions. These solutions can then react with various minerals and organic compounds, promoting hydrolysis. Moreover, the presence of high temperatures and abundant vegetation in tropical climates accelerates the process of hydrolysis.
This results in the decomposition of organic matter, which releases nutrients and minerals that can support plant growth. Overall, hydrolysis plays a crucial role in many environmental processes and is particularly important in regions with high moisture levels.
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Water is utilised in a chemical procedure called hydrolysis to convert complicated molecules into simpler ones.
A humid or moist climate favours this procedure more frequently. In such environments, water is easily accessible and has a propensity to build up in rocks and soils, resulting in the creation of aqueous solutions. The subsequent reactions between these solutions and different minerals and organic molecules can encourage hydrolysis. Additionally, tropical areas' high temperatures and plenty of flora hasten the hydrolysis process.
This causes organic materials to decompose, releasing nutrients and minerals that can help plants flourish. Overall, hydrolysis is critical to many environmental processes and is especially significant in areas with high levels of moisture.
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a proton moving in the plane of the page has a kinetic energy of 6.00 mev. a magnetic field of 1.00 t is directed into the page. the proton enters the magnetic field with its velocity vector at an angle?
The velocity of a proton when it enters the magnetic field is [tex]1.58 × 10^7 m/s.[/tex]
What is the velocity vector at an angle?We can use the equation for the magnetic force on a charged particle to solve this problem:
F = qvBsinθ
where F is the magnetic force, q is the charge of the particle, v is its velocity, B is the magnetic field, and θ is the angle between the velocity vector and the magnetic field.
Since the proton has a positive charge, it will experience a force perpendicular to its velocity vector, which will cause it to move in a circular path in the plane of the page.
The centripetal force required to keep the proton in a circular path is provided by the magnetic force, so we can equate the two forces:
[tex]F = mv^2/r[/tex]
where m is the mass of the proton, and r is the radius of the circular path.
Equating these two forces, we get:
[tex]qvBsinθ = mv^2/r[/tex]
Solving for the radius, we get:
[tex]r = mv/qBsinθ[/tex]
Substituting the given values, we get:
[tex]r = (1.67 × 10^-27 kg)(3 × 10^8 m/s)/((1.6 × 10^-19 C)(1.00 T)sinθ) = 3.32 × 10^-3/sinθ meters[/tex]
The kinetic energy of the proton is also given, which can be related to its speed v:
[tex]K = (1/2)mv^2[/tex]
[tex]v = sqrt(2K/m) = sqrt((2)(6.00 × 10^6 eV)(1.6 × 10^-19 J/eV)/(1.67 × 10^-27 kg)) = 1.58 × 10^7 m/s[/tex]
Substituting this value for v, we get:
[tex]r = (1.67 × 10^-27 kg)(1.58 × 10^7 m/s)/((1.6 × 10^-19 C)(1.00 T)sinθ) = 1.05 × 10^-3/sinθ meters[/tex]
Finally, we can solve for sinθ:
[tex]sinθ = r/(1.05 × 10^-3 meters) = (3.32 × 10^-3 meters)/(1.05 × 10^-3 meters) = 3.15[/tex]
However, since sinθ can only range from -1 to 1, this value is not physically meaningful. Therefore, we can conclude that the proton cannot enter the magnetic field at any angle that will result in a circular path.
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the acceleration due to gravity on the moon’s surface is one-sixth that on earth. what net force would be required to accelerate a 20-kg object at 6.0 m/s2 on the moon?
To determine the net force required to accelerate a 20-kg object at 6.0 m/s² on the moon, we need to consider the acceleration due to gravity on the moon and the object's mass.
The acceleration due to gravity on the moon is one-sixth that on Earth. Since the acceleration due to gravity on Earth is approximately 9.81 m/s², the acceleration due to gravity on the moon is (1/6) * 9.81 m/s² ≈ 1.63 m/s².
Now, we can use Newton's second law of motion, F = m * a, to find the net force required for the given acceleration on the moon. Here, m = 20 kg (mass of the object) and a = 6.0 m/s² (desired acceleration).
Net force (F) = 20 kg * 6.0 m/s² = 120 N.
So, the net force required to accelerate a 20-kg object at 6.0 m/s² on the moon is 120 N.
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how fast must a nonrelativistic electron move so its de broglie wavelength is the same as the wavelength of a 3.4-ev photon?
Answer:
1990.47 m/s
Explanation:
Answer: the answer is in the screen shots
Explanation:
why is uranus' and neptune's atmosphere blue compared to the reds and oranges of jupiter's and saturn's?
The blue color of Uranus and Neptune's atmosphere is due to the presence of methane gas.
Uranus and Neptune have blue atmospheres primarily because of the presence of methane gas. Methane absorbs light in the red part of the spectrum more efficiently than in the blue part, causing the reflected sunlight to appear blue. This is similar to why the ocean appears blue; water absorbs red light more efficiently than blue light, causing the reflected light to appear blue.
In contrast, Jupiter and Saturn have predominantly red and orange atmospheres because of the presence of ammonia and other hydrocarbons. These chemicals absorb blue light more efficiently than red light, causing the reflected sunlight to appear reddish or orange. Jupiter's famous Great Red Spot, for example, is a massive storm that exposes deeper layers of the atmosphere where these chemicals are more abundant, resulting in reddish color.
Overall, the colors of a planet's atmosphere depend on the chemical composition of the atmosphere and how it interacts with sunlight. Different chemicals absorb and reflect different wavelengths of light, giving each planet its own unique coloration.
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when the distance between two charges is halved, the electrical force between the charges is reduced by 1/4. quadruples. halves. doubles. none of the above choices are correct.
When the distance between two charges is halved, the electrical force between the charges quadruples. This is due to the inverse square relationship between distance and electrical force, which means that when distance is halved, the force increases by a factor of 4.
The electrical force between the charges quadruples when the distance between them is halved. This is due to Coulomb's Law, which states that the electrical force (F) between two charges (q1 and q2) is directly proportional to the product of the charges and inversely proportional to the square of the distance (r) between them. Mathematically, it can be expressed as:
F = k * (q1 * q2) / r^2
When the distance (r) is halved, the denominator (r^2) becomes 1/4 of its original value, which causes the electrical force (F) to be 4 times greater, or quadruple.
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When a 0. 30 kg mass is suspended from a massless spring, the spring stretches a distance of 2. 0 cm. Let 2. 0 cm be the rest position for the mass-spring system. The mass is then pulled down an additional distance of 1. 5 cm and released. Calculate the total mechanical energy of the system in SI Units.
Spring constant can be found using Hooke's Law
The total mechanical energy of the system is 0.0066 J.
Using Hooke's Law, the spring constant can be calculated as k = F/x, where F is the weight of the mass and x is the displacement of the spring from its rest position.
In this case:
F = mg,
where m is the mass of the object and g is the acceleration due to gravity.
Therefore, k = (mg)/x.
Once the spring constant is known, the total mechanical energy of the system can be calculated as:
E = (1/2)kx^2.
Substituting the given values, we get
k = 14.7 N/m and x = 0.03 m.
Hence, the total mechanical energy of the system is
E = (1/2)kx^2 = 0.0066 J.
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solid forms of ice last longer because there is more weight with less surface area. (True or False)
The solid forms of ice last longer because there is more weight with less surface area. This statement is false.
Factors like temperature, shape, size, humidity and impurities are some of the factor decides the time for which the ice survives. Even though larger ice particles may have more surface area than solid forms of ice, this does not always imply that they will persist longer.
In reality, due to the insulating effect of the ice itself, larger ice formations, like glaciers, can melt more quickly. In the end, a complex combination of physical, chemical, and environmental elements determines how long ice will last.
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A particle beam is made up of many protons, each with a kinetic energy of 3. 25times 10-15 J. A proton has a mass of 1. 673 times 10-27 kg and a charge of +1. 602 times 10-19 C. What is the magnitude of a uniform electric field that will stop these protons in a distance of 2 m?
The magnitude of the uniform electric field required to stop the protons in a distance of 2 m is 1.10 x 10^32 N/C.
To solve this problem, we need to use the equation for the work done by an electric field on a charged particle:
W = qEd
First, we need to calculate the velocity of the protons:
[tex]K = 1/2 mv^2 \\v = sqrt(2K/m)[/tex]
Plugging in the values, we get:
[tex]v = sqrt(2 * 3.25 * 10^{-15} J / 1.673 * 10^{-27} kg)\\v = 5.94 * 10^6 m/s[/tex]
Time it takes for the proton to stop:
[tex]t = d/v \\t = 2 m / 5.94 * 10^6 m/s \\t = 3.37 * 10^-7 s[/tex]
Finally, we can use the time and the acceleration due to the electric field to calculate the electric field strength:
[tex]a = v/t \\a = 5.94 * 10^6 m/s / 3.37 * 10^{-7} s\\a = 1.76 * 10^13 m/s^2[/tex]
[tex]E = a/q \\E = 1.76 * 10^{13} m/s^2 / 1.602 * 10^{-19} C\\E = 1.10 * 10^{32} N/C[/tex]
Therefore, the magnitude of the uniform electric field required to stop the protons in a distance of 2 m is 1.10 x 10^32 N/C.
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how does the charge depend on time for a discharging capacitor in terms of capacitance c , resistance r , and initial charge q0 ?
The charge on a discharging capacitor decreases exponentially with time, and the rate of the decrease is determined by the resistance and capacitance values in the circuit.
The charge on a discharging capacitor decreases exponentially with time according to the following equation:
[tex]Q(t) = Q0 * e^{-t / (R * C})[/tex]
where Q(t) is the charge on the capacitor at time t, Q0 is the initial charge on the capacitor, R is the resistance in the circuit, C is the capacitance of the capacitor, and e is the mathematical constant known as Euler's number.
The time constant for the discharging process is given by the product of resistance and capacitance,
τ = R * C.
The time constant represents the time it takes for the charge on the capacitor to decrease to approximately 36.8% of its initial value
(i.e.,[tex]Q(τ) = Q0 * e^{-1} ≈ 0.368 * Q0[/tex]).
Therefore, the charge on a discharging capacitor decreases exponentially with time, and the rate of the decrease is determined by the resistance and capacitance values in the circuit.
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The habitable zone around a star depends most on its:
A. color and distance
B. luminosity and velocity
C. mass and age
D. radius and distance
The wavelength of red light is 700nm. Calculate the frequency of red light.
The frequency of red light when the wavelength is 700 NM is 4.29 x 1014 Hz.
Given: Wavelength 700NM.
To Find: Frequency of red light.
Solution: Frequency is the inverse of the period (t) and it is the number of oscillations per unit of time or the number of repetitions of an event by an object per unit of time.
Frequency can also be calculated in terms of wavelength and speed of light.
The formula for frequency is given by the equation:
frequency c (in ms-2) wavelength in m Here,c = speed of light in ms-2 = 3x 108 wavelength = 700 × 10-9 m
The formula for frequency = [tex]\frac{speed }{wavelengh}[/tex]
Frequency = [tex]\frac{3\times 10^{8} }{700\times 10^{-9} } = \frac{30}{7}\times 10^{14} =4.29\times 10^{14}[/tex]
Henceforth, the frequency of red light when the wavelength is 700 NM is 4.29 x 1014 Hz.
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(a) Electric room heaters use a concave mirror to reflect infrared (IR) radiation from hot coils. Note that IR follows the same law of reflection as visible light. Given that the mirror has a radius of curvature of 50.0 cm and produces an image of the coils 3.00 m away from the mirror, where are the coils?
(b) Find the magnification of the heater element in (b). Note that its large magnitude helps spread out the reflected energy.
(a) Coils are located 31.58 cm away from the mirror.
(b) Magnification is -9.50, indicating an inverted image, and the large magnitude helps spread out the reflected energy for effective heating.
(a) We can use the mirror equation to solve for the distance of the object (coils) from the mirror:
1/f = 1/do + 1/di
where f is the focal length (half the radius of curvature), do is the distance of the object from the mirror, and di is the distance of the image from the mirror.
Substituting the given values, we get:
1/25 = 1/do + 1/300
Solving for do, we get:
do = 31.58 cm
So the coils are 31.58 cm away from the mirror.
(b) The magnification, M, is given by:
M = -di/do
Substituting the given values, we get:
M = -3.00 m / 0.3158 m
M = -9.50
The negative sign indicates that the image is inverted. The large magnitude of the magnification means that the reflected energy is spread out over a large area, making the heater more effective at heating a room.
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which statement is true regarding the resolution of a grating? a. resolution increases with wavelength b. resolution decreases with number of grooves per mm c. resolution increases with number of grooves per mm d. resolution is not determined by the monochromator e. resolution increases with slit width
The correct statement regarding the resolution of a grating is that the resolution increases with the number of grooves per mm, the correct option is (c).
The resolution of a grating is defined as the ability to separate two closely spaced spectral lines or wavelengths. It is determined by the number of grooves per unit length on the grating surface, as well as the wavelength of the incident light and the angle of incidence.
A higher number of grooves per mm means that the grating will disperse the incoming light into more angles, resulting in higher resolution. Therefore, the number of grooves per mm is the primary factor that determines the resolution of a grating, the correct option is (c).
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The complete question is:
Which statement is true regarding the resolution of a grating?
a. resolution increases with wavelength
b. resolution decreases with number of grooves per mm
c. resolution increases with number of grooves per mm
d. resolution is not determined by the monochromator
e. resolution increases with slit width
if a wrench is 28 cm long, what force perpendicular to the wrench must the mechanic exert at its end? express your answer with the appropriate units.
If a wrench is 28 cm long, the mechanic must exert a force of 3.57 N perpendicular to the wrench at its end.
To solve this problem, we need to use the formula:
Force = Torque / Distance
where Torque is the product of force and distance. In this case, we know the distance (28 cm), but we need to find the torque first.
Assuming that the mechanic is applying a force perpendicular to the wrench, the torque can be calculated as:
Torque = Force x Distance
where Force is the force exerted by the mechanic at the end of the wrench and Distance is the length of the wrench (28 cm).
Rearranging the formula, we get:
Force = Torque / Distance
Substituting the values, we get:
Force = (Torque) / (Distance)
Force = (1 N.m) / (0.28 m)
Force = 3.57 N
Therefore, the mechanic must exert a force of 3.57 N perpendicular to the wrench at its end. The unit for force is Newtons (N).
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T or F: If one cuts a current carrying wire, the flow of electricity will spill out into the air
False because when a current-carrying wire is cut, the circuit is broken and the flow of electricity is interrupted. The electrons in the wire will stop moving, and there will be no flow of electricity in the air.
The current in the wire is carried by electrons, which are negatively charged particles that are tightly bound to the wire. When the wire is cut, the electrons can no longer flow in a continuous path and the current will stop. However, there may be a brief spark or arc if the wire is cut while there is still a high voltage present, as the electrons try to jump across the gap in the wire. But once the voltage dissipates, the current flow will stop completely.To learn more about electricity please visit:
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False. Cutting a wire that carries current won't cause electricity to discharge into the atmosphere. But the circuit will be broken, and no longer will power be flowing.
A wire produces a magnetic field as current runs through it. The electrons are kept flowing by this magnetic field in a certain direction, and when the wire is severed, the circuit is broken and the electrons cease to move. Nevertheless, if the wire is cut in a way that sparks or if the wire is improperly insulated, the energy may arc or leap to conductive material nearby, potentially posing a threat. Care must be used when handling wires that carry current, and proper safety precautions must be taken.
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A rock thrown horizontally from the roof edge of a 12.4 m-high building hits the ground below, a horizontal distance of 17.8 m from the building. What is the overall speed of the rock when it hits the ground?
The initial volume of air in the rubber balloon was 2 liters, and it was at a temperature of 293 K. The balloon was placed in the parked car, where the volume increased to 2.5 liters. What was the temperature inside the parked car in °C?
a. 3°C
b. 93.25°C
c. 75.53°C
d. 366.25°C
Answer:
B
Explanation:
We can solve this using ratios.
2/293=2.5/x
Cross multiply:
2x=732.5
x=366.25 K
Now we got the temperature in kelvins, but we need to convert it to ⁰C.
All we need to do is subtract 273.15 degrees
366.25-273.15=93.1 ⁰C
it takes light approximately 8 minutes to reach the earth from the surface of the sun. the distance between jupiter and the sun is five astronomical units (5 au). how long does it take light to travel that distance?
It takes light approximately 39.5 minutes to travel the distance from the Sun to Jupiter.
Since it takes light approximately 8 minutes to reach the Earth from the surface of the sun, we know that the distance between the sun and the Earth is 1 astronomical unit (1 au).
Therefore, to find out how long it takes light to travel 5 au (the distance between Jupiter and the sun), we can use the following formula:
time = distance ÷ speed of light
The speed of light is approximately 299,792,458 meters per second.
So,
time = 5 au x 149,597,870,700 meters/au ÷ 299,792,458 meters/second
time = 39.5 minutes
Therefore, it takes approximately 39.5 minutes for light to travel from the surface of the sun to Jupiter.
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