An electrical generator creates electricity by

A) By spinning a turbine with kinetic energy

B) By using Gasoline

C) By exposing a coil of wire to a changing magnetic field

D) By Aligning the magnetic domains of the coil of wire

Answer:

It will take approximately 368.5 seconds for the runner to travel a distance of 3,685 meters.

Explanation:

To calculate the time it will take for the runner to travel a distance of 3,685 meters, we can use the formula:

Time = Distance / Speed

Given:

Speed = 10 m/s

Distance = 3,685 m

Substituting the given values into the formula, we have:

Time = 3,685 m / 10 m/s

Time ≈ 368.5 seconds

Therefore, it will take approximately 368.5 seconds for the runner to travel a distance of 3,685 meters.

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The vertical component of velocity here is 0.509 m/s. Then the vertical distance in 1 s is being 0.509 m. Then the potential energy is 174.5 J.

Potential energy of an object is generated by virtue of its position from a height h from the ground. It is related to the mass and gravity and the height h as follows:

p = mgh.

The velocity of the child = 6.5 m/s

vertical component of v = 6.5 sin 4.5° = 0.509 m/s

thus, vertical distance or height moved in 1 s  = 0.509 m

mass of the child = 35 kg

then potential energy p = 35 kg× 0.509 m/s × 9.8 m/s² = 174.5 J

Therefore, the potential energy being lost will be 174.5 J.

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12. When two objects interact through the gravitational force between them, the more massive one has a lower acceleration than the less massive object.

13. A student walks 20 m north, 10 m south, and 3 m north. To have a displacement of 0 m, the student should walk 13m toward the south.

14. Jennifer's thinking is not supported by Newton's third law of motion because during the collision, the force on her bumper car must be equal in size and opposite in direction to the force on her father's bumper car.

Answer:

1 Atm (atmospheric pressure) is equal to 101325 pascal (Pa). To convert atm to pascal, multiply the atm value by 101325. atm to pascal formula. Pa = atm * 101325.

Explanation:

Answer:that's 16 I think Explanation:

Answer:

It is either 16 or 17

Explanation:

:)

Answer:

below the sedimentary rock layer

The root mean square speed of nitrogen molecules at STP is approximately 515.26 m/s.

To calculate the root mean square (RMS) speed of nitrogen molecules at STP (Standard Temperature and Pressure), we need to use the ideal gas law and the equation for calculating RMS speed.

First, we need to determine the molar mass of nitrogen (N₂), which is approximately 28.0134 g/mol.

Using the ideal gas law equation PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant (8.314 J/(mol·K)), and T is the temperature, we can rearrange the equation to solve for n/V.

n/V = P/RT

At STP, the pressure is 1 atm, the volume is 22.4 L (molar volume of a gas at STP), and the temperature is 273.15 K.

n/V = (1 atm) / (0.0821 atm·L/(mol·K) * 273.15 K) = 0.0409 mol/L

Now we convert the density of nitrogen from kg/m³ to g/L by multiplying by 1000:

Density = 1.23 kg/m³ * (1000 g/kg) = 1230 g/L

Next, we calculate the number of moles in 1 liter of nitrogen gas:

0.0409 mol/L * 1 L = 0.0409 mol

To find the number of molecules, we multiply the number of moles by Avogadro's number (6.0221 × 10²³ molecules/mol):

0.0409 mol * (6.0221 × 10²³ molecules/mol) = 2.463 × 10²² molecules

Now we can use the equation for calculating RMS speed:

RMS speed = √[(3RT) / (molar mass)]

RMS speed = √[(3 * 8.314 J/(mol·K) * 273.15 K) / (28.0134 g/mol)]

RMS speed ≈ 515.26 m/s

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Answer:

Earth

Explanation:

Answer:

Average Velocity = 3.65 m/s

Explanation:

Average Velocity  \(=\frac{Total Displacement}{Total Time}\) \(=\frac{22.1-3.85}{5}=\frac{18.25}{5}=3.65\)

The average velocity of a ball that rolls from x=3.85m to x=22.1m in 5 seconds is -3.65 m/s.

Given the following values:

Initial position, x = 3.85 m

Final position, x'= 22.1 m

Initial time, t = 0 seconds

Final time, t'= 5 seconds

The average velocity can be computed from the ratio of change in displacement and time.

The average velocity is given as:

v = (x'-x)/(t'-t)

v = (22.1-3.85)/(5-0)

v = -3.65 m/s

Hence, the average velocity of a ball that rolls from x=3.85m to x=22.1m in 5 seconds is -3.65 m/s.

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Answer:

There would be complete destructive interference.

Explanation:

This is because since the waves are completely out of phase, the phase difference is half wavelength, that is the phase angle is 180°. The vibrating sources are 180° out of phase with each other.

Since this is the case, the crest of the one source meets the trough of the other, this causes the resultant vibrational wave to cancel out, thus producing a destructive interference pattern.

Since the vibrating sources are completely out of phase, every point they meet is completely out of phase, so the resultant interference pattern would produce a complete destructive interference pattern of no wave.

When two atomic nuclei come together to form a new species of atom, the force that must be overcome is known as the Coulomb force or the electrostatic force.

The Coulomb force is the attractive force between two charged particles, which is given by the Coulomb's law. The Coulomb force (also known as electrostatic force) is an electric force that occurs between charged particles (or objects). Coulomb's law mathematically describes how much force is between two charged objects. The Coulomb force is responsible for holding electrons around the nucleus. Additionally, Coulomb's law states that the force of attraction or repulsion is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

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The question is incomplete. The complete question is :

The Rocket Club is planning to launch a pair of model rockets. To build the rocket, the club needs a rocket body paired with an engine. The table lists the mass of three possible rocket bodies and the force generated by three possible engines.

A 4-column table with 3 rows. The first column labeled Body has entries 1, 2, 3. The second column labeled Mass (grams) has entries 500, 1500, 750. The third column labeled Engine has entries 1, 2, 3. The fourth column labeled Force (Newtons) has entries 25, 20, 30.

Based on Newton’s laws of motion, which combination of rocket bodies and engines will result in the acceleration of 40 m/s2 at the start of the launch?

Body 3 + Engine 1

Body 2 + Engine 2

Body 1 + Engine 2

Body 1 + Engine 1

Solution :

Given :

Body       Mass (gram)     Engine      Force (newtons)

1                   500                 1                     25

2                  1500                2                    20

3                  750                  3                    30

The body 1 has a mass of 500 gram which is equal to 0.5 kg

And engine 2 has a force of 20 newtons.

We know that according to Newton's laws of motion,

Force = mass x acceleration

 20    = 0.5 x acceleration

Acceleration \($=\frac{20}{0.5}$\)

                      \($=\frac{200}{5}$\)

                      \($= 40 \ m/s^2$\)

Therefore, based on laws of motion of Newton, the Body 1 + Engine 2 combination of the rocket bodies and engines will result in an acceleration of \($ 40 \ m/s^2$\) at the start of the launch.

An illustration of the impact of Frontier justice is the idea that people have the right to use fatal force against others who enter their house.

What is Frontier justice?

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The work of friction acting on the body is -5.25 joules when the body slides down from point A to bottom point B.

In this question we are required to find the work done by friction acting on the body. We will find the answer by using the work energy theorem which states that the work done by the sum of all forces acting on a particular equal the change in kinetic energy.

Wnet = K.E

You're in this problem. Only two forces are acting. One is weight force and the other one is friction work done by weight force when the body slides down from point A to B:

Wmg = mgh

Let's assume friction work = Wf

Wnet = mgh + Wf

Now, K.E = 1/2m (Vb² - Va²)

when we put the values in the equation, we get:

K.E = 1/2 × 0.5 × (3² - 0²)

K.E = 2.25J

with this we can find the work of friction acting on the body:

mgh + Wf = 2.25,

0.5 × 10 × 1.5 + Wf = 2.25

7.5 + Wf = 2.25

Wf = 2.25 - 7.5 = -5.25J

Hence, work done by friction is -5.25 joules when the body slides down from point A to bottom point B. Note that negative signs show that friction tends to decrease the velocity of the body and it is directed opposite to the motion of the body.

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Answer:

The answer is approximately 80Nm‐²

Explanation:

Pressure=Force/Area

P=4.39/5.5×10‐⁵

P=4.39×10⁵/5.5

P=79.818Nm‐²

P≈80Nm‐²

The law of conservation of matter states that matter is neither created nor destroyed. It remains the same number before and after the chemical reactions occur.

The number of atoms of each element is the same before and after the chemical reactions.

Thus, the correct option is (C).

a) Answer: On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.

The equator receives an equal day and night (12 hours each) regardless of the day of the year due to the Circle of Illumination, which is a line that separates the day side of the earth from the night side of the earth. The Circle of Illumination separates the sunlit and dark sides of the earth. The earth's axis is at a 23.5-degree angle to the plane of its orbit around the sun, causing different latitudes to receive different amounts of sunlight throughout the year. On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.

b)  Answer: The earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.

On December 22nd, between the latitudes of the Tropic of Cancer (23.5°N) and the Arctic Circle (66.5°N), 24 hours of daylight is experienced. This occurs because the earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.

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Answer:

C

Explanation:

a=change in velocity/ change in time

a=( 60m/s)-(20m/s)/10s

a=(40m/s)/10s

a= 4m/s

If a moped is going 20 m/s, and speeds up to 60 m/s in 10s, the acceleration will be \(4m/s^2\). So, the correct option is C.

Acceleration is defined as the rate of change of velocity of an object with respect to time. Acceleration is a vector quantity which has both magnitude and direction. When an object moves in a circular path with uniform speed, it will be still accelerating as the direction of its velocity is changing.

It is given by the formula formula:

\(\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}\)

where,

\(\overline{a}\) = average acceleration

v = final velocity

\(v_0\) = starting velocity

t = elapsed time

Given , Initial velocity= 20m/s

Final velocity= 60m/s

Time elapsed= 10s

So, acceleration= (60-20)/10= 40/10= \(4m/s^2\)

Thus, if a moped is going 20 m/s, and speeds up to 60 m/s in 10s, the acceleration will be \(4m/s^2\). So, the correct option is C.

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Answer:

44

Explanation:

v=u+a(t)

v=18+4(2)

v=22(2)

v=44 (where v=final velocity,u=initial velocity,a=acceleration,and t=time)

Answer:

meteorite it's on the space when planets are desroy if it made from a rock

The amplitude of the emf in the coil is 62.8 V. We can use the formula below to determine the amplitude of the emf in the coil.E = NBAω

We know that the cross-sectional area of the coil is 20.0 cm² and the number of turns in the coil is 1000.

Therefore, we have N = 1000. Also, the magnetic field in the coil is given as B = 0.5 T.

Let's recall the formula for the amplitude of the emf in the coil given as:E = NBAω,

where, E is the emf in the coil N is the number of turns in the coil, B is the magnetic field,

A is the cross-sectional area of the coil, ω is the angular frequency of the coil.

Using the given values, we can find the amplitude of the emf in the coil as follows:

E = NBAω= 1000 × 0.5 × 20.0 × π × 50= 62,832.0 V= 62.8 V (to 3 significant figures).

Hence, the amplitude of the emf in the coil is 62.8 V.

Therefore, the amplitude of the emf in the coil is 62.8 V.

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Answer:

Distance travel s = 296.8 m

Explanation:

Given:

Initial velocity u = 6.5 m/s

Constant acceleration a = 2.1 m/s²

Time T = 14 s

Find:

Distance travel s

Computation:

s = ut + (1/2)at²

s = (6.5)(14) + (1/2)(2.1)(14)²

s = 91 + 205.8

Distance travel s = 296.8 m

The formula relating kinetic energy and momentum of a particle is expressed as

KE = p^2/2m

let the actual momentum be p. Since the error measurement is 10%, the measurement of the momentum would be

p + 0.1p = 1.1p

Percentage error in the measurement of the kinetic energy is obtained by the formula,

% error = (KEf - KEi)/KEi x 100

where

KEf is the final kinetic energy measured error

KEi is the initial kinetic energy measured without error

Thus,

% error = [(1.1p)^2/2m - p^2/2m)]/p^2/2m x 100

% error = p^2/2m(1.1^2 - 1)/(p^2/2m) x 100

% error = 100(1.1^2 - 1)

% error = 21%

When an airplane travels 640 miles from Topeka to Houston in 3. 2 hours, going against the wind. The return trip is with the wind and takes only 2 hours. Then the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr

Let Va is the velocity of the airplane

Va is the velocity of the wind

When flying against the wind then

(Va+Vw)*(3.2 hours) = 640

3.2Va + 3.2Vw = 640

3.2Vw = 640 - 3.2Va

Vw = 200 - Va----------------(1)

When flying with the wind:

(Va-V)*(2 hours) = 640km

2Va - 2Vw = 640

Va - Vw = 320 ----------------(2)

Putting the value of VW in equation (2) we get

Va - (200-Va) = 320

2Va = 320 +200

2Va = 520

Va = 260

Putting this value in equation (2)

Vw =Va - 360

Vw = 100

Therefore the rate of the airplane with no wind is 260 miles/hr, and the rate of the wind is 100 miles/hr

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Answer:

57 N

Explanation:

Were are told that the force

of gravity on Tomas is 57 N.

And it acts at an inclined angle of 65°

Thus;

The vertical component of the velocity is; F_y = 57 sin 65

While the horizontal component is;

F_x = 57 cos 65

Thus;

F_y = 51.66 N

F_x = 24.09 N

The net force will be;

F_net = √((F_y)² + (F_x)²)

F_net = √(51.66² + 24.09²)

F_net = √3249.0837

F_net = 57 N

Answer:

When replacing an existing luminaire (fixture) with a ceiling-suspended paddle fan, make sure that the existing outlet box is listed and marked as ________one that can support the fan__________

Explanation:

Because an outlet which is not listed an cannot support the fan will lead to its damage and short lifespan