3. two scattering mechanisms exist in a semiconductor. if only the first mechanism is present, the mobility will be 250 cm2 /v-s. if only the second mechanism is present, the mobility will be 500 cm2 /v-s. determine the mobility when both scattering mechanisms exist at the same time.

Given data

*The given mass of the car is m = 1610 kg

*The given effective force constant is k = 5.75 × 10^4 N/m

(a)

The formula for the period of oscillation of a 1610 kg car is given as

Substitute the known values in the above expression as

Hence, the time period of oscillation of a 1610 kg car is T = 1.05 s

(b)

As from the given data, the amplitude of the oscillation of the car decreases by a factor of 5.00. Then, the expression for the amplitude of the oscillation, and the damping constant (b) is calculated as

Substitute the known values in the above expression as

Hence, the damping constant is b = 9871.2 kg/s

Answer:

43.4 N (newton)

Answer:C

Explanation:

If you are holding the ball that would be the ball would have potential energy since it it not moving. Once you drop the ball it will have kinetic energy since it’s moving. If you drop the ball from 6ft it will have more kinetic since it will have more time to accelerate. If you drop the ball from 2ft then it will have less kinetic energy since it is closer to the ground and won’t have beeping time to accelerate and get rid of the potential energy.

Answer:

c

Explanation:

Answer:

Los 11 colores básicos (negro, azul, marrón, gris, verde, naranja, rosa, púrpura, rojo, blanco y amarillo) y los 28 adicionales (turquesa, verde oliva, verde menta, borgoña, lavanda, magenta, salmón, cian, beige, rosado, verde oscuro, verde oliva, lila, amarillo pálido, fucsia, mostaza, ocre, trullo, malva, púrpura

hope that helps bby<3

Answer:

10 millones

Explanation:

En primer lugar, los científicos han determinado que en el laboratorio podemos ver unos 1.000 niveles de luz oscura y unos 100 niveles de rojo-verde y amarillo-azul. Eso es alrededor de 10 millones de colores ahí mismo.

Multiply the masses by the respective distances:

(12 kg) (2 m) = 24 J

(25 kg) (1 m) = 25 J

so the heavier bag takes more work to lift, and (b) is the answer.

(d) is technically correct if the sacks are carrying different contents whose masses are not equal, but since we don't know what's inside each sack, assume 12 kg and 25 kg are the masses of each sack *and* their contents.

A model can be a virtual OR physical representation of an object, movement, etc. A model is used to have a visual view of an item.

Hope this helps and please mark brainliest!

Answer:

more quickly on a hot day

Explanation:

Answer:

-0.37m/s

Explanation:

work out the momentum of both kids

amy : 55 x 3 = 165kg m/s

jenny: 40x - 5 = -200kg m/s

add the momentum then divide it by the total weight so its

-35/95 = -0.37 m/s

hope this helps!!

Four views of a horseshoe magnet and a current-carrying wire are shown in the drawing. The wire is perpendicular to the screen, and the current is directed out of the screen towards you.

The magnetic force acting on a current-carrying wire is influenced by the direction of the current flow and the direction of the magnetic field, which is decided by the magnetic pole it is near. The magnetic field lines created by a bar magnet, for example, run from the north to the south pole.In the given figure, the magnetic field lines are moving from north to south, as shown by the white arrow.

When the direction of the current is perpendicular to the direction of the magnetic field, a magnetic force is exerted on the current-carrying wire. According to the right-hand rule, the magnetic force on the wire will be perpendicular to both the current-carrying wire and the direction of the magnetic field.

According to the right-hand rule, magnetic force will be directed north in the first view (A), and magnetic force will be directed east in the third view (C).

Therefore, magnetic force on the current points due north in the first view (A).Hence, the answer is the first view (A).

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The flux through any closed surface surrounding a cylinder with height H and radius R having surface charge density σ = k sin φ, where k is a constant, is φ₀=2πRLk sin φ/ε₀.

Since the cylinder's surface charge density is given by σ = k sin φ

Therefore, the total charge on the cylinder's curved surface

Q = σ(2πRL)

Where L is the height of the cylinder, Q = 2πRLk sin φ .

From Gauss's Law, the total flux through a closed surface surrounding a cylinder with height H and radius R is given by φ₀=Qε₀ .Here, ε₀ represents the vacuum permittivity. Now, substituting the value of Q, we get

φ₀ = (2πRLk sin φ)/ε₀

Therefore, the flux through any closed surface surrounding a cylinder with height H and radius R having surface charge density σ = k sin φ, where k is a constant, is φ₀=2πRLk sin φ/ε₀.

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In space, the transfer of heat energy between an object and the outside environment primarily occurs through radiation. This is because space is a vacuum, devoid of any medium for conduction or convection, which are the other two modes of heat transfer commonly observed in terrestrial environments.

Radiation is the process by which heat is transferred through electromagnetic waves, such as infrared radiation. All objects with a temperature above absolute zero emit thermal radiation. In the case of an object in space, it radiates heat energy in the form of electromagnetic waves in all directions. These waves carry the energy away from the object into the surrounding space.

Since there is no air or other material in space to conduct or convect heat, radiation becomes the dominant mode of heat transfer. The object's temperature and its emissivity (the ability to emit radiation) play key roles in determining the amount of heat energy radiated. This radiation can travel through the vacuum of space without the need for a physical medium, allowing heat to be exchanged between objects and their surroundings.

Therefore, in the absence of a medium for conduction or convection, radiation becomes the primary mechanism for the input and output of heat energy between objects in space and the outer space environment.

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The extension of the spring is 4.83 m, if work done is 35 Newton and spring constant is 3 k N/m.

The spring constant, k, is a measure of the stiffness of the spring. it's far one of a kind for unique springs and materials. the larger the spring regular, the stiffer the spring and the greater.

Spring constant of 3 k N/m,

The amount of work done in extending is 35 N

WORK DONE by spring force = 1/2 k X²

                                                 ⇒0.5 * 3 * X²

                                   35 N = 0.5 * 3 * X²

                                 X² = 35/1.5

                                  x = \(\sqrt{23.33}\)

                                     X = 4.83 m

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The extension of the spring is can be found out by using the Work Done due to extension in Spring Constant K. The extension in the spring is 4.83m.

The spring constant, k, is a measure of the stiffness of the spring. It is for springs and materials which measures the ratio of force that affects the spring and the displacement caused by the force action.

Spring constant depends on the stiffness of the spring, wire thickness, number of turns in wound coil, length of spring and diameter of the coil.

Given:

Spring constant = 3000 N/m

Work Done in extension= 35 N

Let the extension in spring by x.

∴ Work Done by spring force = 1/2 kx²

                        Work done   = 0.5 × 3 × x²

    ⇒                                 35 N = 0.5 × 3 × x²

    ⇒                                      x² = 35/1.5

     ⇒                                         x = 4.83m

Hence, the extension of spring is 4.83m.

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Answer:

Native Americans should be allowed to use peyote in their religious rituals. The United States should not restrict access to peyote and should not interfere with the use of peyote in Native American rituals. Many religious communities use a substance that can cause a change in consciousness during their ceremonies, including Christian communities who use wine as part of their sacrament. Native Americans use the peyote responsibly and should not be restricted from its use.

Explanation:

yup

False. Adding white to a color produces a tint, while adding black to a color creates a shade.

When we talk about colors, the terms “tint” and “shade” refer to specific changes in their appearance. Adding white to a color creates a tint. This happens because white is the lightest color and has the ability to lighten other colors. When white is mixed with a color, it increases the lightness and creates a paler version of that color. Tints are often associated with a softer and more delicate aesthetic.

On the other hand, adding black to a color creates a shade. Black is the darkest color and has the ability to darken other colors. When black is mixed with a color, it reduces the lightness and creates a darker version of that color. Shades tend to have a deeper, richer, and more intense appearance compared to the original color.

It's important to note that the terms “tint” and “shade” are specifically used when referring to the effects of adding white or black to a color. Other color-related terms such as tone, saturation, and hue describe different aspects of color manipulation.

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According to the statement, If a force 1.21 x 103 N is needed to bring a car moving at 22.0 m/s to a halt in 20.0 s then the mass of the car is 1.10 x 10³ kg.

The push or draw motion is the simplest definition of force. Contact forces and non-energies are two different kinds of forces. Nuclear force, gravitational force, mechanical force, electrostatic force, electrical force, spring force, and others are a few instances of forces.

According to formula

force = mass x acceleration

When the car is brought to a halt, its final velocity is 0 m/s.

[(Final velocity) – (Initial velocity)] / Time = acceleration

acceleration = (0 - 22.0 m/s) / 20.0 s

acceleration = -1.10 m/s²

Note that we have used a negative sign because the acceleration is opposite to the direction of the initial velocity.

1.21 x 10³ N = mass x (-1.10 m/s²)

mass = 1.21 x 10³ N / (-1.10 m/s²)

mass = -1.10 x 10³ kg

The negative mass value doesn't make sense physically, so we need to use the absolute value:

mass = 1.10 x 10³ kg

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From the given position -time graph it is clear that, Amiya covers a distance of 40 meters within 12 seconds.

A position - time graph is used to determine the change in position with respect to the time. We can calculate the average speed of the object from the position -time graph.

Speed is the measure of distance covered within unit time. Hence, it is the ratio of change in position to the change in time. Speed has the unit of m/s .It can also defined as the rate of displacement of an object.

From the given plot, it is clear that the Amiya is 40 meters far after 12 seconds run. After that she stops and the position gets constant. Hence, option A is correct.

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Answer:

A light bulb

Explanation:

Sorry of it wrong

Answer:

3.515625 is your answer

Explanation:

(no idea why you wouldn't use a calculator but here ya go haha)

Answer:

Kinetic energy does not stay the same at all heights

Explanation:

Well as the height and wind increase so does the kinetic energy it's like when you fall as you are about to hit the floor you speed increases

HOPE THIS HELPS YA :)

False. A PBX switch is considered part of the customer premises equipment (CPE) and not part of the Public Switched Telephone Network (PSTN).

Any equipment that is situated on the customer's premises and utilised in the functioning of a telecommunications system is referred to as customer premises equipment (CPE), which includes PBX switches.

The public switched telephone network, or PSTN for short, is the world's network of phone lines, switches, and other hardware used for speech and data transmission. Even though a PBX switch is connected to the PSTN, it is still regarded as belonging to the client.

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Answer:

a skydiver falling at terminal (constant) velocity

Explanation:

When a 12-ohm lamp is plugged into a 90 V outlet, the current flowing through the circuit can be calculated using Ohm's Law. Ohm's Law states that the current (I) is equal to the voltage (V) divided by the resistance (R).  So, the current flowing through the lamp is 7.5 Amperes.

In this case, the voltage is 90 V and the resistance is 12 ohms.

Substituting these values into the formula, we get:

I = 90 V / 12 Ω = 7.5 A.

Therefore, the current flowing through the lamp is 7.5 Amperes.

This means that a rate of 7.5 Coulombs of charge flows through the lamp per second.

It is important to ensure that the lamp and the electrical circuit are designed to handle this current to prevent overheating or other safety issues.

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Answer:

hope it helps you...........

The focal length of a magnifying glass is the distance between the focal point and optical centre of the magnifying glass.

The focal length, f is the distance from a lens or mirror to the focal point, F.

This is the distance from a lens or mirror at which parallel light rays will meet for a converging lens or mirror or appear to diverge from for a diverging lens or mirror.

A magnifying glass is a converging lens which produces a enlarged, erect and virtual image when an object is placed between the focal point and optical centre.

A magnifying glass will bring to focus at a point sun rays which can cause the paper to catch fire if it is held in place for long.

This point at which the most concentrated ray of light is shining on the paper, is the focal point for that magnifying glass.

Therefore, the focal length of a magnifying glass is the distance between the focal point and optical centre of the magnifying glass.

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The specific heat capacity formula is used to determine the quantity of heat required to alter the temperature of a unit mass of a substance by one degree Celsius.

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We want to find how much time will pass before the two cars collide. By using one as a frame of reference, we will see that 8 seconds elapse before the two cars collide.

The frame of reference is the point where the observer is at. For example, if we define one of the cars as a frame of reference, we will see that the selected car does not move (because we move with it, so we can't notice the movement).

Then the velocity of the selected car is "passed on" to the other car.

This means that if we select car A as our frame of reference, which moves at 30 m/s, then we will see that car A does not move, while car B moves with a speed of:

S = 20m/s + 30m/s = 50m/s

The velocities are added because the two cars move in opposite directions (So car A sees that car B comes faster than it actually does).

Now that we are on this frame of reference, we just need to see how long will take car B to travel 400 meters when it moves at 50 m/s

So we need to solve:

Distance/speed = time

With:

(400m)/( 50 m/s) = 8s

This means that 8 seconds elapse before the two cars collide.

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Explanation:

Given parameters:

Force  = 500N

Acceleration  =

Unknown:

Weight can be used to this problem = ?

Solution:

Weight is the vertical force on a body;

       Weight  = mass x acceleration

So from this we can find the mass and then convert to the second wealth.

Answer:

(a) By small angle approximation, we have;

F = -2×T×Δy/l

(b) \(The \ frequency \ of \ oscillation, \ f = \dfrac{1}{2\cdot \pi }\cdot\sqrt{\dfrac{2 \cdot T}{l \cdot M} }\)

Explanation:

(a) The diagram shows the mass, M, being restored by two equal tension, T acting on the elastic strings l, such the restoring force, F acts along the path of motion of the mass, with distance Δy

Therefore, the component of the tension T that form part of the restoring force is given as follows;

Let the angle between the line representing the extension of the elastic strings T and the initial position of the string = ∅

Then we have;

String force, \(F_{string}\) = T×sin∅ + T×cos∅ + T×sin∅ - T×cos∅  = 2×T×sin∅

Whereby the angle is small, we have;

sin∅ ≈ tan∅ = Δy/l

Which gives;

\(F_{string}\) = 2×T×sin∅ = 2×T×Δy/l (for small angles)

Restoring force F = \(-F_{string}\) = -2×T×Δy/l

F = -2×T×Δy/l

(b) Given that the the tensions do not change appreciably as the mass, M, oscillates from Δy we have;

By Hooke's law, F = -k×x

Whereby Δy corresponds to the maximum displacement of the mass, M from the rest position, which gives;

Which gives;

F = M×a = -k×Δy

a =  -k×Δy/M

d²(Δy)/dt² =  -k×Δy/M

When we put angular frequency as follows;

ω² = k/M

We get;

d²(Δy)/dt² =  -ω²×Δy

Which gives;

Δy(t) = A×cos(ωt + Ф)

The angular frequency is thus, ω = √(k/M)

Period of oscillation = 2·π/ω = 2·π/√(k/M)

The frequency of oscillation, f = 1/T = √(k/M)/(2·π)

Where:

k = 2·T/l, we have;

f = √(k/M)/(2·π) = √(2·T/l)/m)/(2·π)

The frequency of oscillation is given as follows;

\(f = \dfrac{1}{2\cdot \pi }\cdot\sqrt{\dfrac{2 \cdot T}{l \cdot M} }\)

Answer:

To find the y-component of the second car's initial velocity, we can use the principle of conservation of momentum. This principle states that the total momentum of a system remains constant unless there is an external force acting on the system.

In this case, we can consider the two cars as a system, and we can use the principle of conservation of momentum to find the y-component of the second car's initial velocity.

We can write the equation for conservation of momentum as follows:

m1v1 + m2v2 = (m1+m2)*v

Where:

m1 is the mass of the first car (1210 kg)

v1 is the velocity of the first car (15.2 m/s, NE at 45.0°)

m2 is the mass of the second car (1540 kg)

v2 is the velocity of the second car (the unknown we are trying to find)

v is the velocity of the system after the collision (23.3 m/s, E at 0°)

We can use this equation to solve for the y-component of the second car's initial velocity (v2). First, we need to express the velocities in the x and y directions.

For the first car, we have:

v1x = v1 * cos(45°) = 15.2 m/s * cos(45°) = 10.6 m/s

v1y = v1 * sin(45°) = 15.2 m/s * sin(45°) = 10.6 m/s

For the second car, we have:

v2x = v2 * cos(0°) = v2 * 1 = 0 m/s

v2y = v2 * sin(0°) = v2 * 0 = 0 m/s

For the system after the collision, we have:

vx = v * cos(0°) = v * 1 = 23.3 m/s

vy = v * sin(0°) = v * 0 = 0 m/s

Now we can substitute these values into the equation for conservation of momentum and solve for v2y:

m1v1x + m2v2x = (m1+m2)vx

1210 kg * 10.6 m/s + 1540 kg * 0 m/s = (1210 kg + 1540 kg) * 23.3 m/s

12776.6 kgm/s + 0 kgm/s = 2750 kg * 23.3 m/s

12776.6 kgm/s = 2750 kg * 23.3 m/s

m1v1y + m2v2y = (m1+m2)vy

1210 kg * 10.6 m/s + 1540 kg * v2y = (1210 kg + 1540 kg) * 0 m/s

12776.6 kgm/s + 1540 kg * v2y = 0 kgm/s

12776.6 kgm/s = -1540 kg * v2y

v2y = -12776.6 kg*m/s / 1540 kg

v2y = -8.28 m/s

Therefore, the y-component of the second car's initial velocity is approximately -8.28 m/s.

Explanation:

The longest wavelength of electromagnetic radiation that will eject photo-electron from the sodium metal is 544 nm.

Electromagnetic radiation consists of waves of electromagnetic field, which propagates through space and carries momentum and electromagnetic radiant energy.

Minimum energy required to knock out an electron from the surface of the metal is called the work function.

As we know that, W= hc/λ

h -- Planck's constant ; c -- Speed of light

and λ is Longest wavelength

Given, work function of sodium metal is 2.28 eV

As 1 eV = 1.6021 * 10^-19 J

=2.28 * 1.6021 * 10^-19

= 3.65 *10^-19 J

W= hc/ λ

3.65 *10^-19 = 6.62 *10^-34 * 3 *10^8/ λ

λ = 5.44 * 10 ^-7m

λ =544 nm

The longest wavelength of electromagnetic radiation that will eject photo-electron from the sodium metal is 544 nm.

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