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3 years ago

Temperature is the measure of the average kinetic energy of the particles in an object. True False

Physics

1 answer:

NemiM [27]3 years ago

3 0

Answer:

true

Explanation:

with increased temperature particles move faster as they gain kinetic energy

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What is limiting friction

Fantom [35]

Answer:

Explanation:

As you start increasing the force on an object from 0 N it the object will stay at rest and at a certain magnitude of force the object will start moving. The friction acting on that object is known as limiting frictional force. The magnitude of this frictional force is equal to the force that we apply on the object as it just start to move.

It's important to note that the limiting frictional force is the largest frictional force act on that object in the above explained process. The dynamic frictional force ( the frictional force acting on an moving object.) is always less than the limiting frictional force.

5 0

3 years ago

Which of the following is the flow of electrons through a wire or a conductor?

Sonja [21]

Explanation:

electric current is the answer

7 0

3 years ago

The force of gravity considers which two parts?

attashe74 [19]

Mass of object/source
Gravity
Fg=mg

3 0

3 years ago

a 200 kg crate is pushed horizontally with a force of 700 N. If the coefficient of friction is 0.2 calculate the acceleration of

Crazy boy [7]

Answer:

$a=1.54\ m/s^2$

Explanation:

<u>Net Force</u>

The Second Newton's law states that an object acquires acceleration when an external unbalanced net force is applied to it.

That acceleration is proportional to the net force and inversely proportional to the mass of the object.

It can be expressed with the formula:

$\displaystyle a=\frac{F_n}{m}$

Where

Fn = Net force

m = mass

The m=200 kg crate is pushed horizontally with a force Fa=700 N. The friction force opposes motion and a horizontal net force appears causing the acceleration.

The forces on the vertical direction are in balance since the crate does not accelerate in that direction, thus the weight and the normal force are equal:

N = W = mg

The friction force can be calculated by using the coefficient of friction μ:

$F_r=\mu N$

Calculating the normal force:

N = 200 * 9.8 = 1,960 N

The friction force is:

$F_r=0.2*1,960$

$F_r=392\ N$

The horizontal net force is:

$F_n = F_a-F_r=700\ N - 392\ N$

$F_n = 308\ N$

Finally, the acceleration is computed:

$\displaystyle a=\frac{308}{200}$

$\boxed{a=1.54\ m/s^2}$

3 0

3 years ago

The main purpose of the turbine in the turbojet engine is to

AnnZ [28]

<span>The correct answer is A. drive the compressor. It's not D because the compressor compresses it, not the turbine. The temperature and the velocity of gasses are unrelated to this. There are in fact two turbines, and the first one gets power from exhaustion, which is then used to power to turbine in the turbojet that is used to drive the compressor. This is how turbojets commonly work.</span>

8 0

3 years ago