a car company wants to ensure its newest model can stop in 50 m when traveling at 30 m/s (which is about 108 km/h). if we assume constant deceleration, find the value of deceleration that accomplishes this

Ionising radiation such as alpha and beta particles or gamma rays are detected using the Geiger-Müller (GM) tube. The radiation enters the tube through a very thin window at one end.

A radioisotope used for diagnostics must generate enough gamma rays to escape from the body and have a short enough half-life to decay away shortly after imaging is concluded. Tc-99 is the most often used radioisotope in medicine, accounting for approximately 80% of all nuclear medicine treatments.

Nuclear imaging is used to study the function of organs and tissues. During the operation, a trace amount of a radioactive chemical is used to aid in the examination. Body tissue absorbs the radioactive substance, known as a radionuclide (radiopharmaceutical or radioactive tracer).

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The statements is true concerning a magnifying glass is it produces a virtual image.

A divergent lens or a convex mirror are used to create a virtual image. Finding a virtual image involves tracking actual rays that leave an optical tool back to their observed or apparent sources. A virtual image cannot be projected onto a screen because the rays never truly converge.

The mirror reflection is the best illustration of a virtual image. Real images are made when rays connect, but virtual images are made when rays diverge. On a screen, real images can be projected but virtual ones cannot. Two opposing lenses, concave and convex, are used to create real images.

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To measure one wavelength, you would measure the distance between A and B.

option D is the correct answer.

The wavelength of a wave is the distance travelled by a given a wave.

The wavelength of a wave is measured in meters and it depends on the frequency and speed of the wave.

One wavelength is distance measured from the trough to another trough of  the wave form or the distance measured from crest to another crest of the wave form.

In the given image, the following are one wavelength;

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a) The maximum height is 3.5 m

b) The time taken to reach this height is 0.85 seconds

c) The time taken to return to the original point is 0.85 seconds.

We know that the maximum height can be obtained from the use of the kinematic equations. We know that;

a) v^2 = u^2 - 2gh

v = final velocity

u = initial velocity

g = acceleration due to gravity

h = maximum height attained

v= 0 /ms at the maximum height

u^2 = 2gh

h = u^2/2g

h = (8.3)^2/2 * 9.8

h = 68.89/10.6

h = 3.5 m

b) Time taken to reach the maximum height;

v = u - gt

v= 0 /ms at the maximum height

u = gt

t = u/g

t = 8.3/9.8

t = 0.85 seconds

c) The time taken to return is the same as the time taken to go up which is 0.85 seconds.

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The beat frequency is always equal to the difference in frequency between the two notes that interact to create the beats.

First wave frequency 5Hz

Second wave frequency 227Hz

Beat frequency 〰️222Hz.

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In a massive centrifuge, centripetal forces accelerate trainee astronauts to extremely high speed is 49.3 frac ms2 and 5.

During a rocket launch, an astronaut's maximum g-force is typically around 3gs. The passengers can withstand this, which is equivalent to three times the gravity that people experience while they are on Earth.

a)a c=omega2 r=frac4 pi 2 r, T2=49.3 frac ms2, and a c = 2 r= T 2

4π \s2 \s r \s​ \s =49.3 \ss \s

m \s​ \s ,

b)frac = k=F aP=\frac{a c}

g=5.k= P \sF \s\s = \sg \sa \​ \s =5.  

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The kinetic energy of the ball just after it is kicked is 48 J.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all instances of objects in motion that use kinetic energy.

Vibrational, rotational, and translational energy are the three subtypes of kinetic energy. Unsurprisingly, vibrating things are the source of vibrational kinetic energy. While objects colliding with one another produce translational kinetic energy, objects moving create rotational kinetic energy.

Given:

Mass- 0.43kg

Velocity- 15

kinetic energy = 1/2 mv²

kinetic energy of the ball = 1/2 (0.43)(15)²

kinetic energy of the ball = 48 J.

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Answer: Find the right angle degree and then you will find ow to do the rest.

Mass refers to a body of matter's resistance to changing its speed or location in response to the application of a force.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter.It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force.The change caused by an applied force is smaller the more mass a body has.

The work done to place the box at tree house=350 J.

The distance from ground to tree house =4.0 m and g = 9.8/8²

E =mgh

m = 350 J / (9.8/8²* 4.0m)

m=8.929kg

Hence the mass of the box is 8.929kg

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Answer:

a = − 1.579 [tex]\frac{m}{s^{2} }[/tex]

b. t = 3.52s

We have velocity in km/hr and displacement in m. Since we have to make a unit conversion, might as well do it so it will yield the answer in the normal (SI) units for acceleration.

u = 100 x [tex]\frac{5}{18}[/tex] = 27.78 [tex]\frac{m}{s}[/tex]

v = 80 x [tex]\frac{5}{18}[/tex] = 22.22 [tex]\frac{m}{s}[/tex]

Using the formula of motion [tex]v^{2} - u^{2}[/tex] = 2*a*d

[tex](22.22)^{2}[/tex] - [tex](27.78)^{2} \\[/tex] = 2 * a * 88

a = -1.579 [tex]\frac{m}{s^{2} }[/tex] = acceleration

Since the acceleration was constant, we can use the average velocity, and the distance to determine the time.

time = [tex]\frac{displacement}{speed}[/tex]

t = [tex]\frac{88}{speed}[/tex]

speed = [tex]\frac{1}{2}[/tex] * (u+v) = [tex]\frac{1}{2}[/tex] * (22.22 + 27.78) = 25[tex]\frac{m}{s}[/tex]

t = [tex]\frac{88}{25}[/tex] = 3.52 s

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The acceleration of the car is equal to -1.58 m/s. The time required for the given decrease in speed is equal to 3.52 s.

The equations of motion can be utilized to describe the relationship between the acceleration, velocity, time, and displacement of a moving object.

The equations of motions can be mathematically expressed as shown below:

[tex]v = u + at\\S= ut +\frac{1}{2}at^2\\ v^2-u^2 = 2aS[/tex]

Given, the initial velocity of the police car, u = 100 Km/h = 27.78 m/s

The final velocity of the car, v = 80 Km/h = 22.22 m/s

The displacement of the car, S = 88m

From the third equation of motion: v²- u² = 2aS

(22.22)² - (27.78)² -  = 2 × a × 88

a = - 1.58 m/s²

Calculate the time from the first equation of motion: v = u + at

22.22 = 27.78 + (-1.58) × t

t = 3.52 sec

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The solar system when the milky way galaxy collides with the andromeda galaxy in billions of years will likely be unharmed.

For milky way galaxy,

For Andromeda galaxy,

When these galaxies collide in about 5 billion years from now, the central black hole of Andromeda galaxy with a mass of 100 million suns will swallow up the central black hole of milky way galaxy with a mass of 4 million suns.

Therefore, the solar system when the milky way galaxy collides with the andromeda galaxy in billions of years will likely be unharmed.

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For a charged particle, a constant magnetic field can be used to change for a charged particle, only the direction of the particle's velocity .

magnetic force = q(VxB)  

which is perpendicular to V and B

so it can't change magnitude only can change direction.

A magnetic field is a vector field near a magnet, an electric current, or an alternating electric field where the observed magnetic forces exist. A magnetic field consists of moving electric charges and the internal magnetic moments of elementary particles associated with a fundamental quantum property called spin. The magnetic field and the electric field are both related and are components of the electromagnetic force, which is one of the four  forces of nature.

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Speed of the command module relative to earth just after the separation is 5785.2Km/h

Velocity of speed of Vehicle = 5800km/h

mass = 4m + m = 5m

relative velocity = v2 - v1 = 74 km/h

v2 = 74 + v1

using conservation of momentum,

(5800)(5m) = 4m(v1) + m(v2)

V1 = 5785.2km/h

Momentum in Newtonian physics is defined as the sum of an object's mass and velocity, or more specifically, as its linear momentum or translational momentum. As a vector quantity with both a magnitude and a direction, it has both. The momentum of an item is expressed as follows: if an object has mass (m) and velocity (v), both of which are vector quantities.

The newton-second is a unit of measurement for momentum in the International System of Units (SI), and the kilograms metre per second (kg m/s) is its SI counterpart.

A body's momentum changes at a rate equal to the net force exerted on it, according to Newton's second law of motion. However, in any inertial frame, momentum is independent of the frame of reference.

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We think that it once had huge amounts of water content in its atmosphere.

The Solar System is the gravitationally bound system that includes the Sun and the objects that orbit it. It was formed by the gravitational collapse of a massive interstellar molecular cloud 4.6 billion years ago. The Sun contains the vast majority (99.86%) of the system's mass, with Jupiter holding the majority of the remaining mass. Mercury, Venus, Earth, and Mars are all terrestrial planets made mostly of rock and metal. The four outer system giant planets are significantly larger and more massive than the terrestrials. Jupiter and Saturn are gas giants, composed primarily of hydrogen and helium; Uranus and Neptune are ice giants, composed primarily of volatile substances with relatively high temperatures.

Hence, If Deuterium is more abundant on Venus than elsewhere in the solar system, I think that it once had huge amounts of water content in its atmosphere.

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Intensity and time interval of a sound can be compared between the two ears to locate the source of a sound.

Intensity of the sound is defined as the proportion of energy that flows per unit time through a unit area perpendicular to the direction of motion of such sound waves.

The time it takes for a sound wave to complete one cycle is called its time interval or the time period.

A person's loudness perception is affected by the amount of sound they hear.

Therefore intensity and time interval can be considered as the sound characteristics to compare between the two ears to locate the source of a sound.

The question is incomplete, the complete question is:

'What sound characteristics can be compared between the two ears to locate the source of the sound?

a. sound shadows and frequency

b. frequency and amplitude

c. intensity and time of arrival

d. timbre and rhythm'

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Peak thermal radiation for the human body at 310 K has a wavelength of 9.3 mm.

The average body temperature is 310.15 oK. The infrared region is where the radiation peaks as a result. Red light with wavelengths as long as 7,000 Angstroms can be seen by the human eye. Generally speaking, infrared wavelengths are those between 7,000 and 1,000,000 Angstroms.

Light's wavelength is used to measure it (in nanometers). It is typically represented by the Greek letter. Visible light is typically defined as having a wavelength between 400 and 700 nanometers (nm), or one billionth of a meter.

The distance between equivalent places in two consecutive light cycles is known as the wavelength of light, and the frequency of light is the number of light cycles that pass a specific spot in a second.

Atoms or molecules that undergo discrete energy level transitions give rise to narrowband radiation.

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Frequency is inversely proportional to the wavelength of electromagnetic radiation.

When the wavelength of light is doubled, the frequency is reduced to its original value.

Short wavelength UV (ultraviolet) light will have more energy.

The distance between identical points (adjacent crests) in adjacent cycles of a waveform signal propagated in space or along a wire is defined as the wavelength.

The relationship between frequency of electromagnetic radiation and wavelength of radiation is:

ν==1/λ

Where,

ν= frequency

As a result, the frequency of electromagnetic radiation is inversely proportional to its wavelength.

The frequency is reduced to its original value when the wavelength of light is doubled.

The energy of a photon is proportional to the frequency of light.

Using Relationship,

E=hν=h c/λ

h = Planck's constant

c = speed of light

Both h and c are constants

As a result, energy will be reduced to its initial value.

The light with the shortest wavelength will have the greatest energy.

UV (ultraviolet) light with a shorter wavelength has more energy.

It is because of the previously stated relationship..

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The maximum speed at which the car could be moving will be 20 m/s.

Speed is the ration of total distance travelled by an object to the total time taken by the object to cover that particular distance.

Mathematically, Speed (v) = [tex]\frac{Distance (d)}{Time (t)}[/tex]

d = v*t

d = distance traveled

v = initial speed

t = time = 0.75v

d1 = 0.75(t)

Total distance = d1 + d2 = 35m

35 = 0.75v + d2

d1=35-0.75v

According to the Equations of motion.

[tex]v^{2} = s^{2} - 2sd1[/tex]

[tex]v = \sqrt{s^{2} - 2ad1 }[/tex]

where

s = final speed = 0m/s

v = Initial speed

a = acceleration = -10m/s2

d1 = displacement

[tex]v = \sqrt{0 - 2(-10)(35-0.75v) }[/tex]

[tex]v^{2} = 700 - 15v[/tex]

[tex]v^{2} + 15v -700 = 0[/tex]

On solving the above quadratic equation we get two values of v as:

v1 = 20 m/s

v2 = -35m/s

Since the velocity of the car has to be taken and also the car is moving in the forward direction, therefore v1 will be considered as the final velocity of the car, i.e. the maximum speed at which the car could be moving and not hit the barrier 35.0 m ahead will be 20 m/s.

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Answer:

Explanation:

c = 180

i have same problem and it work

The maximum weight the rocket burn is 15000N or 15kN

Now in the question rocket burns the fuel at the rate 300g/s . we are supposed to deduce the maximum weight the rocket burn have if its going to move vertically upward.

As per Classical Mechanics , overall momentum of the system is conserved biding all conservational laws.

Force= mass x acceleration

F= m dv/dt

F=v dm/dt

v=500m/s

dm/dt=300

F=500 x 300

=15kN

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The ratio of her final to initial kinetic energy is 1.33

What is conservation of angular momentum?

Conservation of angular momentum is a principle in physics according to which the total angular momentum of a system remains constant as it is free from external torque irrespective of all the various types of interaction and transformation taking place within the system. It is a physical property of spinning system. The easiest example of conservation of angular momentum is Earth spinning around at the same rate from last billions of years.

Iiwi = Ifwf

Where Ii = Initial Angular momentum

If = Final Angular momentum

wi= initial angular velocity

wf = final angular velocity

wf= Iiwi / If

= Iiwi/ 0.75 Ii

= 1.33 wi

Ki= ½ = Iiwi2

Kf= ½ (0.75) Ii (1.33 wi)2

= 1.33 Ki

Kf/ Ki = 1.33 Ki/ Ki

= 1.33

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The momentum of a single photon in the pulse is 1.19 * 10^-27 kg m/s.

It is the quantity of motion of a moving body, measured as a product of its mass and velocity.

How to calculate the momentum of a single photon in the pulse?
Wavelength of light is given,
λ = 556nm = 556 * 10^-9m

Wavelength and momentum (p) are related by
λ = h/p

Where h is the planck constant = 6.63 * 10^-34 m^2 kg/s

So, the momentum is

p = h/λ

[tex]\frac{6.63*10^{-34} }{ 556*10^{-9}}[/tex]

p = 1.19 * 10^-27 kg m/s

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0.80tesla is a strength of a magnetic field.

At a distance r from the wire, a current I flowing through a long, straight wire generates a magnetic field with intensity H=I/2r. In other words, the field's strength is inversely proportional to the distance from the wire.

Newtons per coulomb (N/C) or volts per meter (V/m) are the SI units for measuring electric field strength. E = F/q, where F is the force felt by a very small test charge q placed in a field E in a vacuum, gives the force felt by the charge.

given,

I = 5A , r = 1.0m

H=I/2πr

H = 5 / 2*3.14*1.0

H = 0.80tesla

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To learn frequency to known frequency and frets of guitar.

What is frequency?

The number of waves that pass a fixed point in a unit of time is referred to as frequency in physics. It also describes how many vibrations or cycles a body in periodic motion makes in a given amount of time.

What is the purpose of frets?

Frets, which determine the positions for the proper notes, make it much simpler for a player to achieve an acceptable standard of intonation. Furthermore, playing chords accurately is made simpler by a fretted fingerboard.

Frequency of the vibrations of the strings.

f=2LnmT, where T is the tension in the string, L is the length, and n is the number of harmonics, gives the frequency of vibration of a string.

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The distance between the two asteroids, given that the gravitation force between them is 1030 N, is 3.59×10⁷ m

From Newton's law of universal gravity, we understood that the force of attraction / repulsion between two objects is given as:

F = GM₁M₂ / r²

Where

With the above formula, we can determine the distance between the two asteroids. This is illustrated below:

F = GM₁M₂ / r²

1030 = (6.67×10¯¹¹ × 1.41×10¹⁴ × 1.41×10¹⁴) / r²

Cross multiply

1030 × r² = 6.67×10¯¹¹ × 1.41×10¹⁴ × 1.41×10¹⁴

Divide both sides by 1030

r² = (6.67×10¯¹¹ × 1.41×10¹⁴ × 1.41×10¹⁴) / 1030

Take the square root of both sides

r = √[(6.67×10¯¹¹ × 1.41×10¹⁴ × 1.41×10¹⁴) / 1030]

r = 3.59×10⁷ m

Thus, the distance between them is 3.59×10⁷ m

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Magnitude of the acceleration would be 36 m/s^2.

Force is nothing but an influence that can change the motion of object or can make changes into the object. Sometimes we apply force but still there is no effect. Mathematically when object comes into motion after applying force, Force is the product of the mass of the object and the accelerations of the body, so we can write

F = ma

now putting the values, we can get that force is

F = 0.25 x a

a = F/0.25

a = 9/0.25

a = 900/25

a = 36 m/s^2

Hence the acceleration would be 36 m/s^2.

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The kind of electronic transitions that is responsible for colored light being given off is called emission.

Emission is the discharge of something, particularly radiation or gas. Emission spectrum or line spectrum is the given off of electromagnetic radiation when an electron transits from a higher energy level to a lower energy level. During the course of transition from one level to another, energy generated are emitted in the form of white light by the atoms and molecules. When electrons in the ground state of an energy level is heated, it rises to a higher energy level. It thus releases energy quickly to maintain a balanced state or go back to the ground state. If the energy released is equal to the energy that produces white light, it will form colored light.

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The maximum voltage that can be applied to the whole network is 39.46V.

The explanations given here are that Power equals current times Voltage (P=VxI), Voltage equals Power divided by current (V=P/I), and current equals Power divided by Voltage (I=P/V).

Power and Voltage:

The equation for the relationship between power, resistance, and voltage is

P = V²/R

P is for power,

R stands for resistance,

and V for voltage.

Given that the resistors

V = [tex]\sqrt{PR}[/tex]

Consequently, the maximum voltage for the 2.8k resistor will be:

V = [tex]\sqrt{(0.2)(2800)}[/tex]

V = 23.66V

The maximum voltage for the 2.1k resistor will be similar:

V = [tex]\sqrt{(0.2)(2100)}[/tex]

V = 20.49V

This is lower than the 2.8k resistor's maximum voltage.

The voltage between the 2.8k and 2.1k resistors must be same because they are connected in parallel.

The highest voltage that can be applied across this parallel configuration is 20.49V since a voltage of 23.66V would be too high for the 2.1k resistor to handle.

Similarly, the voltage drop across the series-connected 1.8 k resistor is:

V = [tex]\sqrt{PR}[/tex]

V = [tex]\sqrt{(0.2)(1800)}[/tex]

V = 18.97V

Consequently, the highest voltage that can be used over the entire network is

20.49V + 18.97V = 39.46V

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Therefore, U equal to cV T represents the change in internal energy for an ideal gas, where cV stands for specific heat (at constant volume) and T for change in temperature.

Increase in temperature is 0.0176 degree Celsius. b. the remaining energy will be lost.

The mass of copper block = 1.8kg

Initial speed = 3.1 m/s

Specific heat of copper = 0.385 j/g degree Celcius.

a. The increase in temperature is calculated below:

Change i kenetic energy = 1/2mv²

= 1/2 *1.8*4²= 14.4J

85% of energy is converted into internal energy.

mc =14.4*0.85

1.8*385 = 14.4*0.85

12.24/693

=0.0176

The remaining  15 per cent of kinetic energy will be lost and it will be changed into other forms.

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