momentum is conserved it can be transferred but not lost. true or false​

An electric motor converts electric energy into mechanical energy. So, the right option is C.

In contrast to an electric generator, an electric motor transforms electrical energy into mechanical energy.

They function according to electromagnetism's principles, which demonstrate that a magnetic field's electric current exerts a force.

In the magnetic field, this force produces a torque that spins a loop of wire, causing the motor to function.

Fans, power tools, appliances, electric vehicles, and hybrid vehicles are just a few examples of the many uses for electric motors.

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Answer:

2.2 ft

Explanation:

0.65 lb / 1 ft = 1.4 lb / x

x ≈ 2.2 ft

The moment of inertia (I) will changes and net torque (Tnet) will also change, while the angular acceleration (a) remains constant.

The formula for net torque acting on an object is given as;

T(net) = Ia

where;

The  moment of inertia of an object is given as;

I ∝ MR²

where;

So mass, M changes, the moment of inertia (I) changes and net torque will also change, while the angular acceleration remains constant.

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Answer:

The formula for potential energy depends on the force acting on the two objects.

As per the given data, the angular speed of the compact disc is 1188 degrees per second.

To convert the angular speed of a compact disc from one unit to another, we can use the following conversion factors:

1 revolution (rotation) = 360 degrees

1 minute = 60 seconds

1. Angular speed in degrees per second:

The given angular speed of the compact disc is 3.3 rotations per second. To convert this to degrees per second, we multiply by the conversion factor:

Angular speed in degrees per second = 3.3 rotations/second * 360 degrees/rotation

Angular speed in degrees per second = 1188 degrees/second

Therefore, the angular speed of the compact disc is 1188 degrees per second.

2. Angular speed in rotations per minute (rpm):

To convert the given angular speed of 3.3 rotations per second to rotations per minute (rpm), we multiply by the conversion factor:

Angular speed in rotations per minute = 3.3 rotations/second * 60 seconds/minute

Angular speed in rotations per minute = 198 rotations/minute

Therefore, the angular speed of the compact disc is 198 rotations per minute (rpm).

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Answer: Can't see clearly.

Explanation:

Answer:

Letter A. \(y=4.55 m\)

Explanation:

Let's use the wave equation:

\(y=Asin(kx-\omega t)\)

Therefore the displacement y will be:

\(y=6.44*sin(2.34*1.21-2.88*0.71)\)

\(y=4.55 m\)

The answer is letter A.

I hope it helps you!

Answer:

Explanation:

Find the displacement of a simple harmonic wave of amplitude 6.44 m at t = 0.71 s. Assume that the wave number is 2.34 m-1, the angular frequency is 2.88 rad/s, and that the wave is propagating in the +x direction at x = 1.21 m.

Amplitude (A) of the simple harmonic wave = 6.44 m

wave number (k) of the given wave = 2.34 m-1

Angular frequency (ω) of the given wave = 2.88 rad/s

Displacement x = 1.21 m and time t = 0.71 s

Then the general equation for the displacement of the given simple harmonic wave at given x and time t is given by

y = Asin(kx - ωt)

= (6.44 m)sin[(2.34 m-1)(1.21 m) - (2.88 rad/s)(0.71 s)]

Y=6.44sin(0.7866 rad)

0.7866rad*(180 degrees/pi rad) =45.1

Y=6.44sin(45.1)

Y=4.55m

Answer:

Surface tension, capillary action, and viscosity are unique properties of liquids that depend on the nature of intermolecular interactions. Surface tension is the energy required to increase the surface area of a liquid by a given amount. The stronger the intermolecular interactions, the greater the surface tension

The mass of the planet is  5.98 × 10^24 kg.

To calculate the mass of the planet, we can use Kepler's Third Law of Planetary Motion. This law states that the square of the period of revolution of a planet around the sun is directly proportional to the cube of the semi-major axis of its orbit.

First, we need to convert the period of the satellite's orbit to seconds. We know that there are 60 minutes in an hour, so the period can be expressed as (6 × 60 + 12) minutes, which equals 372 minutes. Multiplying this by 60 seconds, we get a period of 22,320 seconds.

Next, we need to find the semi-major axis of the orbit. In a circular orbit, the semi-major axis is equal to the radius of the orbit. Therefore, the semi-major axis is 8.8 × 10^6 m.

Now, we can apply Kepler's Third Law to calculate the mass of the planet. The formula is T^2 = (4π^2/GM) × a^3, where T is the period of revolution, G is the gravitational constant, M is the mass of the planet, and a is the semi-major axis of the orbit.

Rearranging the formula, we can solve for the mass of the planet:
M = (4π^2/G) × a^3 / T^2

Plugging in the values, we get:
M = (4 × π^2 / 6.67430 × 10^-11) × (8.8 × 10^6)^3 / (22,320)^2

Evaluating this expression, we find that the mass of the planet is approximately 5.98 × 10^24 kg.

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Answer: I think it’s Global for the 1st one

And free trade for the 2nd one

Explanation:

The correct answer is: "After World War II, political leaders from various countries discussed ways to strengthen individual economies." They began promoting economic policies to boost production and exports.

After World War II, many countries were left with weakened economies and infrastructure, and there was a need for economic recovery and growth. To achieve this, political leaders from different countries came together to discuss ways to strengthen their individual economies and also promote international economic cooperation. One of the ways they did this was by promoting economic policies that aimed to boost production and exports. This involved policies that encouraged businesses to increase their output and create more jobs, as well as policies that made it easier for countries to trade with each other.

Hence, after World War II, political leaders from various countries discussed ways to strengthen their individual economies. They began promoting economic policies to boost production and exports.

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Answer:

Because chemical energy is being converted into thermal energy.

Explanation:

Answer:

1.92

2.61

Explanation:

The average time taken by the car to cover a distance of 0.25 meters and 0.50 meters which is based on the three trial times are :

Distance of 0.25 meters = 2.23 seconds

Distance of 0.50 meters = 3.13 seconds

Distance is defined as a numerical or sometimes a qualitative measure of how far objects or points are. Distance can be described as a physical length or as an approximation based on other criteria.

It can be calculated by:

Distance= Speed x time

Where, Distance is in Meter or kilometer

Speed is in meter per second or km/min

Time is in seconds or minutes

From the above formula, we can also calculate the time like for above given information,

Average travel time to cover 0.25 meters :

(Trial 1 time + Trial 2 time + Trial 3 time) ÷ 3

(2.24 + 2.21 + 2.23) ÷ 3

(6.68 ÷ 3) = 2.226667 = 2.23 seconds

Average travel time to cover 0.50 meters :

(Trial 1 time + Trial 2 time + Trial 3 time) ÷ 3

(3.16 + 3.08 + 3.15) ÷ 3

9.39 ÷ 3 = 3.13 seconds

Thus, the average time taken to cover 0.25 and 0.50 meters are 2.23 and 3.13 seconds respectively

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Answer:

Reproducibility of research

Explanation:

The principle of science that explains why similar experimental investigations conducted in different parts of the world could result in the same outcome is referred to as reproducibility.

A good research or experiment in science must be reproducible, otherwise, the outcome of such an experiment might become inadmissible within the scientific community. It is a core principle of the scientific method that similar results should be obtained when an experiment or observational study conducted in one place is repeated in another place with the same procedure. Hence, an experiment must be reproducible in science in order for the outcome of such an experiment to be part of the general scientific knowledge.

Hello,

I hope you and your family are doing well!

To find the angle of the applied force (α), you can rearrange the equation for the net force to solve for α. The equation for the net force is:

F_net = F * cos(α + β) - m * g * sin(β) - u * N

To solve for α, you can start by isolating the term containing α. You can do this by subtracting the other terms from both sides of the equation, which gives you:

F_net - F * cos(β) + m * g * sin(β) + u * N = F * cos(α + β)

Then, you can divide both sides of the equation by F * cos(β) to get:

[F_net - F * cos(β) + m * g * sin(β) + u * N] / (F * cos(β)) = cos(α + β)

Next, you can use the identity cos(a + b) = cos(a)cos(b) - sin(a)sin(b) to rewrite the right side of the equation:

[F_net - F * cos(β) + m * g * sin(β) + u * N] / (F * cos(β)) = cos(α)cos(β) - sin(α)sin(β)

Finally, you can rearrange this equation to solve for α:

α = atan2(sin(α) * cos(β) + cos(α) * sin(β), cos(α) * cos(β) - sin(α) * sin(β))

This equation gives the angle of the applied force (α) in terms of the other variables in the equation for the net force.

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Happy Holidays!

The resistance indicated by the platinum thermometer at 200°C is 1.648 times the reference resistance Ro at 0°C.

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Answer:

1.body composition, (2) flexibility, (3) muscular strength, (4) muscular endurance, and (5) cardio respiratory endurance.

Explanation:

Answer:

The component of fitness you should work on every time you exercise are your muscular strength, muscular endurance, physique (body composition), your flexibility, and endurance.

Explanation:

it is important to focus on these types of exercise in order to have a well balanced routine/fitness and to stay in fit.

hope this helps !:)

The 10/90 principle can be a powerful tool for taking control of your situation and improving your life. By taking responsibility for what you can change and focusing on your reaction to the situation, you can make positive changes in your life and become the master of your own destiny.

The 10/90 principle refers to the idea that life is made up of 10% of what happens to you and 90% of how you respond to it. In other words, you may not be able to control what happens to you, but you can control your reaction to it. By taking responsibility for what you can change rather than being a victim of what you cannot change, you can take control of your situation and improve your life.One example of a situation where the 10/90 principle could be applied is losing a job. Losing a job can be a devastating experience, and it can be easy to feel like a victim in this situation. However, by applying the 10/90 principle, you can take control of your situation and make positive changes in your life.The first step in applying the 10/90 principle in this situation would be to take responsibility for what you can change. This could mean updating your resume, networking with others in your field, and applying for new jobs. By taking action and doing what you can to find a new job, you are taking control of your situation and improving your chances of finding a new job.
The second step would be to focus on your reaction to the situation. Instead of dwelling on the negative aspects of losing your job, try to focus on the positive aspects. This could mean using the extra time to pursue a new hobby or spend more time with family and friends. By focusing on the positive aspects of the situation, you are taking control of your reaction and improving your overall well-being.
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Answer:

The speed stays constant after the force stops pushing.

Explanation:

Speed always stays constant when the force stops pushing it.

A bicycle slows down uniformly from vi=8.40 [m/s] to rest over a distance of 115 [m]. Each wheel and tire has an overall diameter of 0.68 [m]. The magnitude of the angular acceleration of the wheel is approximately 0.0757 rad/s².

To determine the magnitude of the angular acceleration of the wheel, we need to first calculate the change in angular velocity and the time taken to come to rest. Then we can use these values to find the angular acceleration.

Calculate the initial angular velocity:

The initial linear velocity of the bicycle wheel is given by the formula v = ω * r, where v is the linear velocity, ω is the angular velocity, and r is the radius of the wheel.

The radius of the wheel is half the diameter, so r = 0.68 m / 2 = 0.34 m.

Given the initial linear velocity vi = 8.40 m/s, we can calculate the initial angular velocity ωi:

vi = ωi * r

ωi = vi / r

Calculate the final angular velocity:

The final angular velocity of the wheel is 0 rad/s since it comes to rest.

ωf = 0 rad/s

Calculate the change in angular velocity:

The change in angular velocity (Δω) is given by the formula Δω = ωf - ωi.

Δω = 0 - ωi

Calculate the time taken to come to rest:

To calculate the time taken to come to rest, we can use the formula v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.

Given the initial velocity vi = 8.40 m/s, final velocity vf = 0 m/s, and distance d = 115 m, we can calculate the acceleration a:

vf = vi + at

0 = 8.40 + a * t

We also know that the distance traveled d is related to the initial and final velocities and the time by the formula d = (vi + vf) / 2 * t:

d = (vi + vf) / 2 * t

115 = (8.40 + 0) / 2 * t

From the two equations above, we can solve for the acceleration a and the time t.

Calculate the angular acceleration:

The angular acceleration (α) is given by the formula α = Δω / t.

α = Δω / t

Substitute the values for Δω and t and calculate the angular acceleration.

Therefore, the magnitude of the angular acceleration of the wheel is approximately 0.0757 rad/s².

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Answer

A. Yes, because they did several tests with the soccer balls and recorded their observations. B. Yes, because every student kicked

Explanation:

Answer:

Approximately \(-15.37m/s^2\)

Explanation:

The acceleration can be found using the formula:

\(x_{f} = x_{i} + v_{i} (t)+\frac{1}{2} (a)(t^{2} )\)

The work is as shown:

\(45m = 0 + 39 m/s (3.3s)+\frac{1}{2} a(3.3s)^2\)

\(45m=128.7m + 5.445s^2 a\)

\(-83.7m=5.445s^2a\)

\(a = -15.37190083m/s^2\)

a is about -15.37\(m/s^2\)

Explanation:

time = Charge / Current.

time = 80/5

time = 16 seconds.

The aspect of the graph and possibly other quantities must be used to calculate how much the disk’s angular speed increases during the process, the engineer must use the area under the graph of torque as a function of time and the disk's moment of inertia.

To calculate how much the disk’s angular speed increases during the process, the engineer must use the area under the graph of torque as a function of time and the disk's moment of inertia. The area under the graph represents the change in angular momentum, which is equal to the product of the disk's moment of inertia and the change in angular speed. By dividing the area under the graph by the disk's moment of inertia, the engineer can determine the increase in angular speed.
In mathematical terms, the change in angular speed can be calculated using the following equation:
Δω = (1/I) ∫τ dt
Where,

Δω is the change in angular speed

I is the moment of inertia of the disk

τ is the torque, and

t is time.
Therefore, the engineer must use the area under the graph of torque as a function of time and the disk's moment of inertia to calculate how much the disk’s angular speed increases during the process.

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Answer:

C.) The book's inertia carried it forward.

The book was at rest on the bus seat and had a tendency to stay at rest due to its inertia. When the bus stopped suddenly, the seat and the book accelerated forward due to the force applied by the bus. However, the book still had the tendency to stay at rest due to its inertia. This means that the book remained at its initial position for a brief moment while the seat and the bus moved forward. As a result, the book slid off the seat and moved forward with the same acceleration as that of the bus. So, it was the book's inertia, i.e. the resistance to change in its state of rest, that caused it to slide forward.

Answer:

C) The book's inertia carried it forward.

An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and direction, unless acted upon by an unbalanced force. In this case, the book was initially at rest on the seat, but when the bus stopped suddenly, the book's inertia kept it moving forward in the same direction and speed as the bus was moving before it stopped, causing it to slide off the seat.

Explanation:

The net force on q3 due to q1 and q2 is \(-13.76 * 10^{-3} N\).

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Answer:

Holes are formed when electrons in atoms move out of the valence band (the outermost shell of the atom that is completely filled with electrons) into the conduction band. (the area in an atom where electrons can escape easily) which happens everywhere in a semiconductor. When an electron and a hole interact and recombine the energy is not transferred into heat energy or thermal vibrations. instead the energy is transferred into an electron within the conduction band which is then promoted to an energy higher in condition band.

Explanation:

So considering that information, electrons and holes make a semiconductor when moving.

Answer:

ggggggggggggggggggggggggggggg

Explanation:

Answer:

The volume of the sample of gold is

16.51 \(cm^{3}\)

Explanation:

The formula for density is:

D= \(\frac{M}{V}\).

where:

D is density,

M is mass, and

V is volume.

Rearrange the density formula to isolate volume.

V= \(\frac{M}{D}\)

V= \(\frac{318.97g Au}{19.32g cm^{3}}\)

V= 318.97∅ ×  \(\frac{1 cm^{3} Au}{19.32g cm^{3} }\)← Multiply by the multiplicative inverse of the density.

V= 16.51 cm³ Au.

The acceleration of the object is  2.5 m/s^2

The idea that should be at the back of your mind when you hear the use of the term acceleration is the change in the velocity of the object with respect to the time.

In this case, we have to look at the graph that we have been given in the question. It is a graph of the velocity against the time and the slope of the graph is the acceleration of the motion that is under consideration.

a = 100 - 0/40 - 0

= 2.5 m/s^2

We have the acceleration as 2.5 m/s^2

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Answer:

One idea is how, on an astronomical level, the planets can be observed to spread apart continuously.

Explanation:

Throughout various studies, many have observed that the planets continuously grow distant from each other. In fact, it is observed through our technological advances that the very galaxies are slowly drifting apart. Thus, indicating there must have been some big bang to set these galaxies and planets in motion.