A 900.0kg car is traveling at 11.0m/s. What is the momentum of this car?

A P-N-P transistor is turned on when the base is negative with respect to the emitter.

The operation of a P-N-P transistor is based on the principle of a semiconductor diode. When a small current is applied to the base, it causes a larger current to flow through the emitter and collector. This is because the base-emitter junction is forward-biased, allowing electrons to flow from the emitter to the base. At the same time, the collector-base junction is reverse-biased, allowing holes to flow from the base to the collector.

This flow of electrons and holes produces a current gain. The amount of current gain depends on the type of transistor and the amount of current applied to the base.

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The change in enthalpy of an incompressible substance with a density of 1000 kg/m³ that is isothermally compressed from 100 to 1000 kPa is 0 kJ/kg.

Enthalpy is a measure of the total energy of a thermodynamic system. In addition, it incorporates the energy that is supplied to the system as heat, as well as any energy that is used as work. Enthalpy is represented by the symbol H and is usually calculated in units of joules (J).

An incompressible substance is one that cannot be compressed or compressed to a significant degree. Liquids are examples of such materials. They are often described as having a constant density because, unlike gases, they do not easily change in volume in response to pressure or temperature changes. Therefore, the change in enthalpy is 0 kJ/kg.

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As a positively charged glass rod is brought near the knob of the electroscope, the separation of the leaves will increase.

What is Charge?

Charge is a fundamental property of matter that determines how objects interact with each other through the electromagnetic force. It is a physical property that can be positive or negative and can be measured in coulombs (C).

This is because the positively charged glass rod will induce a negative charge on the metal knob of the electroscope. The negative charges will repel the electrons in the metal leaves, causing them to move away from each other and increasing their separation. The greater the amount of charge on the glass rod, the greater the separation between the leaves will be.

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For calculation of potential energy mass of the apple , average acceleration of the apple and height of apple is required.

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The speed of sound is found out to be 349.4 ms⁻¹ from the frequency of the seventh resonance heard when the water level is 217.75 cm below the top of the tube.

Frequency of wave:

v = nλ

where, v = speed of sound, n = frequency, λ = wavelength

Speed of sound:

v = frequency n × wavelength λ

Frequency, n = v/λ

Wavelength, λ = v/n

The 7th resonance frequency of the tuning fork is given by:

n = 7 × f

where, f is the frequency of the tuning fork

Speed of sound, v = nλ

Speed of sound, v = 7fλ

Speed of sound, v = 7 × 256 Hz × λ

λ = 1.3671 m

Distance travelled by the sound wave in the water column is L = h + l

where, h = length of the air column and l = length of water column where the resonance was heard.

L = h + l

L = 217.75 cm + 50 cm

L = 267.75 cm = 2.6775 m

Length of the air column, h = L - l

where, l = length of water column where the resonance was heard.

h = 2.6775 m - 0.5 m

h = 2.1775 m

Wavelength of sound wave in air column, λ₁ = 4h

λ₁ = 4 × 2.1775 m

λ₁ = 8.71 m

Frequency of the sound wave in air column is given by:

n = v/λ₁

n = 349.4 ms⁻¹ / 8.71 m

n = 40.112 Hz

The 7th resonance frequency of the tuning fork is given by:

n = 7 × f

40.112 Hz = 7 × f

Frequency of the tuning fork, f = 5.73 Hz.

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. Additionally, Star 1 has prominent hydrogen lines, indicating a lower temperature than Star 2. Therefore, the statements can be sorted into the true and false bins as indicated above.

True: Star 1 has a longer lifetime than Star 2; Star 2 is bluer than Star 1; Star 2 has a lower mass than Star 1; Star 1 has prominent hydrogen lines.

False: Star 2 has a higher luminosity than Star 1; Star 2 is cooler than Star 1.

The spectra of the two main sequence stars illustrate some differences between the two stars. Star 1 is on the left and has a longer lifetime than Star 2, which is on the right. This is evident from the intensity axes that are not on the same scale. Star 2 has a lower mass than Star 1, is bluer than Star 1, and has a lower luminosity

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If the object in motion has some magnetic properties or contains a magnet, we can use another magnet to change its direction of motion by exerting a force on it through magnetic interaction. This principle is known as the Lorentz force.

Here's how we can set up the experiment:

Take a magnet and place it on a flat surface.

Take another magnet or the object with magnetic properties that is in motion.

Hold the magnet or the object in your hand and bring it close to the stationary magnet without touching it.

Move the magnet or the object towards the stationary magnet and observe its behavior.

If the magnet or the object has the same polarity as the stationary magnet, they will repel each other, and the motion of the object will be deflected in a direction away from the stationary magnet. If the magnet or the object has opposite polarity to the stationary magnet, they will attract each other, and the motion of the object will be deflected in a direction towards the stationary magnet.

Here's a diagram to help you visualize the setup:

                 N   S          N   S

       __________    __________

      |                       |  |                     |

      |   M1               |  |           M2     |

      |__________|  |__________|

              ( )                             ( )

               |                               |

        Motion              Stationary

        Object                 Magnet

In this diagram, M1 represents the motion object or magnet, and M2 represents the stationary magnet. The N and S represent the North and South poles of the magnets. The arrows indicate the direction of motion and the direction of the magnetic field.

As we move M1 towards M2, the magnetic interaction will exert a force on M1, causing it to change its direction of motion. The direction of deflection will depend on the polarity of the magnets.

Note: It's important to keep in mind that the magnetic force is only one of the many factors that can affect the motion of an object. Other factors such as friction, air resistance, and gravitational forces can also play a significant role.

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The masses listed on the periodic table are not whole numbers because they represent the weighted average of all the naturally occurring isotopes of an element.

Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei, resulting in slightly different masses. Since the abundance of each isotope in nature can vary, the weighted average takes into account the abundance of each isotope and their corresponding masses, resulting in a decimal value. For example, oxygen has three naturally occurring isotopes, with mass numbers of 16, 17, and 18.

The most abundant isotope is oxygen-16, but the other isotopes are also present in trace amounts, leading to a weighted average of 15.9994 amu (atomic mass units). This is why the mass listed on the periodic table for oxygen is 15.999, which is a rounded value of the weighted average.

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The masses listed on the periodic table are not whole numbers because they represent the average atomic mass of all the naturally occurring isotopes of an element, taking into account their relative abundances.

What are isotopes ?

Isotopes are atoms of the same element that have different numbers of neutrons in their nucleus, which affects their atomic mass. Some isotopes of an element are more abundant than others, and their relative abundances are taken into account when calculating the average atomic mass.

For example, oxygen has three naturally occurring isotopes: oxygen-16, oxygen-17, and oxygen-18. Oxygen-16 is the most abundant isotope, making up about 99% of all oxygen atoms. Oxygen-17 and oxygen-18 are much less abundant, but they still contribute to the overall atomic mass of the element.

The atomic mass listed on the periodic table for oxygen (15.9994) is the weighted average of the atomic masses of all three isotopes, taking into account their relative abundances. This average is not a whole number because the isotopes have different atomic masses and abundances, and their contributions to the overall average are weighted accordingly.

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If the whole picture plane is affected by aerial diffusion, it stops being an effective indicator of depth - this statement is true.

Aerial diffusion is the scattering of light by particles in the air. These particles cause distant objects to appear fainter and bluer than closer objects, leading to a decrease in visual clarity and the ability to perceive depth. Aerial diffusion can be utilized in painting and drawing to create an atmospheric perspective, which produces a sense of depth by making objects are that further away appear hazier and less distinct than those that are closer. However, if the entire picture plane is affected by aerial diffusion, this can make it difficult to distinguish between objects at different depths, which can result in a lack of clarity and depth perception in the painting or drawing.

A picture plane is a theoretical plane that corresponds to the surface of a painting or drawing. The picture plane is where the artist organizes and arranges the various elements of the composition to create a visual representation of a scene. The picture plane is where the viewer's eye interacts with the artwork, and where the illusion of depth and space is created. In this context, the picture plane is an important factor in the creation of depth and atmosphere in a painting or drawing.

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The total work done on a particle is given by the formula:

W = (1/2)mvf^2 - (1/2)mvi^2

where m is the mass of the particle, vi is the initial velocity, and vf is the final velocity.

For vi = 5 m/s and vf = 2 m/s, the final velocity is less than the initial velocity, so the total work is positive.

For vi = -2 m/s and vf = -5 m/s, the final velocity is less than the initial velocity, so the total work is positive.

For vi = -5 m/s and vf = 2 m/s, the final velocity is greater than the initial velocity, so the total work is negative.

For vi = 5 m/s and vf = -2 m/s, the final velocity is greater than the initial velocity, so the total work is negative.

For vi = -5 m/s and vf = -2 m/s, the final velocity is less than the initial velocity, so the total work is positive.

Therefore, the total work done on the particle is positive for vi = 5 m/s and vf = 2 m/s, and for vi = -2 m/s and vf = -5 m/s.

In order for work to be done, there must be a displacement of the object in the direction of the force applied. If the force and displacement are perpendicular, then no work is done.

Work can be positive, negative, or zero, depending on the direction of the force and the displacement. Positive work is done when the force and the displacement are in the same direction, negative work is done when they are in opposite directions, and zero work is done when there is no displacement or when the force and displacement are perpendicular.

Work is a transfer of energy, and as such it can change the kinetic energy, potential energy, or both of an object.

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The correct statement of the ripples on the pond is that they have a frequency of 2 hertz.

In physics, the number of cycles of a periodic wave that occur in a unit of time is known as the frequency of that wave. Its unit is hertz (Hz), which indicates cycles per second.A hertz is a unit of frequency that indicates how many times per second a wave oscillates. The amount of time it takes for one complete cycle of the wave is inversely proportional to its frequency. A wave with a high frequency oscillates more frequently than one with a low frequency.What is hertz (Hz)?Hertz (Hz) is the standard unit of frequency. One hertz (Hz) is equal to one cycle per second, meaning that a wave with a frequency of 2 Hz repeats twice in one second. Therefore, the frequency of the ripples on the pond is 2 hertz.

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The required mass of the cube when width of the cube and density of the cube are specified is calculated to be 0.0502 kg.

The width of the cube is given as 18.45 mm = 18.45 × 10⁻³ m

The density of the cube is given as 8 × 10³ kg/m³.

Mass of the cube is to be found out.

The general formula for density of a cube is given by, V = s³

where,

V is volume

s is side/width/height (As they are all equal in a cube)

So, the volume of the cube is,

V = (18.45 × 10⁻³)³ = 0.01845³ = 6.28 × 10⁻⁶ m³

Now, we know the general equation for density as, mass upon unit volume.

Mathematically, D = m/V

Making m as subject, we have,

Mass m = D × V = 8 × 10³ × 6.28 × 10⁻⁶ = 50.24× 10⁻³ kg = 0.0502 kg

Thus, the required mass is calculated to be 0.0502 kg.

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None of the answer options provided are correct as they all involve calculations that assume certain values for the pressure, volume, and temperature of the gas.

What is Constant Pressure?

Constant pressure is a thermodynamic process in which the pressure of a system remains constant during the process. This means that any change in volume or temperature of the system must be accompanied by a corresponding change in some other property, such as the amount of heat added or removed from the system.

Since the gas is compressed at a constant pressure, the work done on the system can be calculated as:

W = -PΔV

In this case, P is constant, so we have:

W = -P(V2 - V1)

W = -P(4 m^3 - 10 m^3)

W = -P(-6 m^3)

W = 6P m^3

Since we are not given any information about the type of gas or its properties, we cannot use the ideal gas law to calculate the pressure P. Therefore, we cannot determine the exact value of the work done on the system.

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Option C, The net force on the toy locomotive moving on a straight track along the x-axis is equal to zero at t=3s.

A force is any push or pull that results in a modification in the state of motion of an object. The net force on an object is the combination of all forces acting on it in a specific direction. An object in motion will continue to move in a straight line at a steady velocity unless acted upon by a net force, according to Newton's first law of motion. The equation of motion for the toy locomotive is as follows:

x = t³ - 6t² + 9t

We must differentiate this equation twice to determine the acceleration of the toy locomotive.

a = x′′= 6t - 12, At time t = 3 seconds, the net force on the toy locomotive is zero. This occurs when the acceleration of the toy locomotive equals zero.

6t - 12 = 0t = 2

Therefore, the net force on the toy locomotive moving on a straight track along the x-axis is equal to zero at t = 3 seconds.

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Answer:

See below.

Explanation:

When the 1500 kg car collides with the wall and rebounds at a speed of 5.00 m/s, we can calculate the change in the car's velocity using the following formula:

Δv = v2 - v1

Where Δv is the change in velocity, v2 is the final velocity, and v1 is the initial velocity. Substituting the given values, we get:

Δv = 5.00 m/s - 20.0 m/s

Δv = -15.0 m/s

The negative sign indicates that the direction of the car's velocity has reversed, or that the car is now moving to the left. To calculate the magnitude of the change in velocity, we take the absolute value:

|Δv| = |-15.0 m/s|

|Δv| = 15.0 m/s

Therefore, the magnitude of the change in velocity is 15.0 m/s.

Now,

To find the magnitude of the average force acting on the car during the collision, we can use the impulse-momentum theorem, which states that:

Impulse = change in momentum

Average force = Impulse / time

The change in momentum of the car is given by:

Δp = mΔv

where Δv is the change in velocity calculated in the previous answer and m is the mass of the car.

Δp = 1500 kg × (-15.0 m/s)

Δp = -22500 kg·m/s

The impulse acting on the car during the collision is equal to the change in momentum:

Impulse = Δp = -22500 kg·m/s

To find the magnitude of the average force acting on the car during the 250 ms collision, we divide the impulse by the duration of the collision:

Average force = Impulse / time

Average force = -22500 kg·m/s / 0.250 s

Average force ≈ -90,000 N

The negative sign indicates that the force is in the opposite direction of the car's motion, or to the left. Therefore, the magnitude of the average force acting on the car during the collision is approximately 90,000 N.

Answer:

in image

Explanation:

I don't think so it helped but through this you can do the question exactly like this ( in this way) ...

The correct answer is option D.2 years

According to Kepler's Third Law of Planetary Motion, T² is proportional to r³, where T is the period of revolution of the planet and r is the distance between the planet and the star.

In order to solve for T,  

AU = 1

Astronomical Unit = the average distance between the Earth and the Sun = 149.6 million kilometres

Therefore, the planet is orbiting at a distance of 149.6 million kilometres from the star.

Substituting the values of r and solving for

T².T² ∝ r³T² ∝ (149.6)³T²

= (149.6)³T²

= 3.522 x 10¹²T

= √3.522 x 10^¹²T

= 1.87 x 10⁶ seconds

T = 31,100 minutes

T = 518 hours

T = 21.6 days

T = 2 years

Therefore, the orbital period of the planet with twice the mass of Earth orbiting at a distance of 1 AU from a star with the same mass as the Sun is 2 years.

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The energy needed to heat the water and the copper tank to 55°C is 25,083,080 J.

Q = mCΔT

m = 150 kg (mass of water)

C = 4.18 J/g°C (specific heat capacity of water)

ΔT = 55°C - 15°C = 40°C (change in temperature)

Using the formula, we get:

[tex]Q_{water}[/tex] = mCΔT

[tex]Q_{water}[/tex] = (150 kg) x (4.18 J/g°C) x (40°C)

[tex]Q_{water}[/tex] = 25,080,000 J

m = 20 kg (mass of tank)

C = 0.385 J/g°C (specific heat capacity of copper)

ΔT = 55°C - 15°C = 40°C (change in temperature)

Using the formula, we get:

[tex]Q_{tank}[/tex] = mCΔT

[tex]Q_{tank}[/tex] = (20 kg) x (0.385 J/g°C) x (40°C)

[tex]Q_{tank}[/tex]= 3080 J

Finally, we can add the two energies together to get the total energy needed:

[tex]Q_{total}[/tex] = [tex]Q_{water}[/tex] [tex]+[/tex] [tex]Q_{tank}[/tex]

[tex]Q_{total}[/tex] [tex]= 25,080,000 J + 3080 J[/tex]

[tex]Q_{total}[/tex] [tex]= 25,083,080 J[/tex]

Energy is a fundamental concept that refers to the ability of a physical system to do work or cause a change. It is a scalar quantity that is measured in units of joules (J) in the International System of Units (SI). According to the law of conservation of energy, energy cannot be created or destroyed, but it can be transformed from one form to another. This means that the total amount of energy in a closed system remains constant.

Energy is a crucial concept in many areas of physics, including mechanics, thermodynamics, and electromagnetism. Understanding energy is essential for understanding how the physical world works, and it has numerous applications in technology and everyday life, from powering our homes and vehicles to the production of food and the functioning of our bodies.

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Star A's light will take longer to reach us.

The tension in the right-hand side wire is 6525 N.

Given:

To find: Tension in the right-hand side wireWe know that the sum of forces acting in a vertical direction should be equal to 0 as there is no acceleration in the vertical direction. ∑Fv = 0In the horizontal direction, there are no forces acting on the system.

∑Fh = 0Now considering forces in the vertical direction: T1 + T2 = (Weight of scaffold + Weight of the box) gT1 + T2 = (180 + 580) x 9.8T1 + T2 = 7644 N1. From the diagram, we can see that the box is nearer to the left side. Hence, the tension force in the left wire is greater than the tension force in the right wire.

T1 > T22. Let's take moments about the right end of the scaffold as shown in the figure below.

Now, we can substitute the value of T2 in equation (1):

To find T2, we can substitute the value of T1 in equation (2):

Therefore, the tension in the right-hand side wire is 6525 N.

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The dimensions of the field can be found to be 75 yards in width and 150 yards in length.

Given:
Let the width of the rectangular field be x
Length of the rectangular field = 2x
Perimeter of the rectangular field = 450 yards

Formula Used:
Perimeter of a rectangle = 2 (l + w)

Where l and w are the length and width of the rectangle respectively.

Solution:
As per the question,
Perimeter of the rectangular field = 450 yards

Therefore, 2(Length + Width) = 450
2(x + 2x) = 450
2(3x) = 450
6x = 450
x = 75
Therefore, the width of the rectangular field is 75 yards
Length of the rectangular field = 2x = 2 × 75 = 150 yards

Hence, the dimensions of the field are 75 yards by 150 yards.

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The power dissipation in the ion channel is 4.9 mW given that the potential difference across the ion channel is 70 mv

The power dissipated by a resistor is given by the formula:P = V² / RwhereP = PowerV = VoltageR = Resistance

The power dissipated in the ion channel is unknown. However, we can consider the ion channel to have a resistance of 1 Ω. This is because the resistance of an ion channel is very small and close to zero. So, we can assume the resistance of the ion channel as 1 Ω.As we know the potential difference across the ion channel, we can use the above formula to find the power dissipated in the ion channel.P = (70 mV)² / 1 ΩP = 0.0049 W = 4.9 mW

Therefore, the power dissipation in the ion channel is 4.9 mW.

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"The required angle Ф between the filter's polarizing axis and the direction of polarization of light necessary to increase the ratio of the clouds' intensity to that of the blue sky so that it is three times the normal value is 65.9°."

A photographer wants to click a picture of a cloud formation, the ratio of clouds intensity to that of the blue sky photographer uses polarizing filter from Malus law,

I = I₀ cos²Ф

So, I f = I i cos²Ф

As the light from cloud is polarized, its intensity reduces to half.

I c = I₀/2

The intensity of light from sky is polarized light.

I s = I₀ cos²Ф

Hence, the ratio of intensities is,

I c/I s = (I₀/2)/(I₀ cos²Ф)

3 = (I₀/2)/(I₀ cos²Ф)

cos²Ф = 1/6

Thus, the required angle is Ф = cos⁻¹(1/√6) = 65.9°

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The Kuiper belt is a disk-like region between the outer planets and the Oort cloud. Thus, option A is correct

The Kuiper belt, also known as the trans-Neptunian region, is a doughnut-shaped region of space beyond Neptune that is home to an estimated 100,000 tiny, icy objects.

It is named after Dutch-American astronomer Gerard Kuiper, who first proposed its existence in 1951.

The belt ranges in distance from 30 to 50 astronomical units (AU) from the Sun, which is about 2.8 to 4.7 billion miles away.

The Kuiper belt objects are believed to be remnants from the formation of the solar system. They are small and mostly made up of ice and dust, similar to comets.

Some Kuiper belt objects, such as Pluto and Eris, are classified as dwarf planets.

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To keep the leg in the raised position, the tendon should provide 160N force.

The rotating force or moment of a force around a particular axis or pivot point is measured by torque. The tendency of a force to cause an object to spin along an axis is described as a vector quantity, torque.

Given: combined mass of the lower leg and the foot, m = 3.6kg

position of the center of gravity, r1 = 25cm

r = 0.25m

distance between tendon and lower leg, r2 = 5cm = 0.05m

torque applied will be τ = 3.6 × 10 × 0.25

τ = 8 N-m

the force applied by tendon

F = τ/ r2

F = 8/ 0.05

F = 160N

Therefore, To keep the leg in the raised position, the tendon should provide 160N force.

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Plants help to reduce water runoff and soil erosion, both of which affect the health of streams and rivers by impacting water quality.

Soil erosion increases the silt load in the water, which can smother living organisms, particularly plants and invertebrate species. Runoff water can carry pollutants, particularly pesticides, and herbicides from agricultural land.

Landscape 1 (streams cutting through small farms with a variety of crop types and natural vegetation buffers between the fields and the streams) would be the best quality, followed by Landscape 2 (a large floodplain area covered in lowland forests and swamps full of emergent vegetation, with small streams cutting through the area) and Landscape 3 (an urban housing development where the streams are surrounded by emergent vegetation).

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Answer:

B The light will bend upward as is indicated by arrow A.

Explanation:

I just did the progress learning test

The angular acceleration of the blades  is 5.897 rad/s². It can be calculated using the formula α as the ratio of torque to moment of Inertia.

The torque is a rotational or twisting force. Angular acceleration is the rate at which the angular velocity of an object changes, measured in radians per second squared (rad/s²).

Given the torque and moment of inertia, we may utilize the following formula to find the angular acceleration of the blades:

[tex]\alpha= \dfrac{Torque}{Moment \; of \; inertia}\\\alpha= \dfrac{\tau}{I}[/tex]

where τ is the torque in newton-meters (N-m),I is the moment of inertia in kg-m², α is the angular acceleration in radians per second squared (rad/s²).

Rearranging the formula to solve for α gives:

[tex]\alpha=2.3/0.39\\=5.897 rad/s^2[/tex]

Therefore, the angular acceleration of the blades is 5.897 rad/s².

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Answer:

✓ 1. radio 2. infrared 3. orange 4. green 5. ultraviolet

Explanation:

The proton accelerates from rest in a uniform electric field of 600 n/c. In order to find the time interval it takes for the proton to reach a speed of 1.50 mm/s.

We need to use the equation v = v₀ + at, where v is the final velocity, v₀ is the initial velocity (which is 0 in this case), a is the acceleration, and t is the time interval. The acceleration of the proton in the electric field is a = E/m, where E is the electric field and m is the mass of the proton. Substituting these values into the equation gives us:

1.50 mm/s = 0 + (600 n/c/1.67 x 10⁻²⁷ kg) x t

Rearranging the equation and solving for t gives us the time interval:
t = 1.50 mm/s/(600 n/c/1.67 x 10⁻²⁷ kg)

t = 8.33 x 10⁻¹³ s

t = 8.33 ms

Therefore, it takes the proton 8.33 ms to accelerate from rest to a speed of 1.50 mm/s in the uniform electric field of 600 n/c.

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