All categories

3 years ago

Describe how air particles differ in the way they move when air begins to cool.

1 answer:

7 0

<span>when air cools , the temperatures drops, the molecules move slowly taking up less space , the amount of space the air takes ups shrinks , or reduce the air pressure
</span>

You might be interested in

Two wheels have the same mass and radius of 4.4 kg and 0.48 m, respectively. One has (a) the shape of a hoop and the other (b) t

abruzzese [7]

Answer:

1) $\sum T_{externalhoop}=0.4418Nm$

2) $\sum T_{externaldisc}=0.2209Nm$

Explanation:

Using the second equation of angular motion we have

$\theta =\omega _{o}t+\frac{1}{2}\alpha t^{2}$

Since the wheels start from rest we ahve $omega _{o}=0$

Applying the given values in the equation we have

$14=\frac{1}{2}\alpha \times 8^{2}\\\\\therefore \alpha =\frac{28}{64}=0.4375rad/s^{2}$

Now by newton's second law of motion in angular motion we have

$\sum T_{external}=I\alpha$

1) For Hoop We have

$I_{hoop}=Mr^{2}\\\\\therefore I_{hoop}=4.4\times(0.48)^{2}=1.01376kgm^{2}$

Thus

$\sum T_{external}=1.01376\times 0.4375$

$\sum T_{external}=0.4418Nm$

2)For disc We have

$I_{disc}=\frac{Mr^{2}}{2}\\\\\therefore I_{hoop}=2.2\times(0.48)^{2}=0.506kgm^{2}$

Thus

$\sum T_{external}=0.506\times 0.4375$

$\sum T_{external}=0.2209Nm$

5 0

4 years ago

What is a wave? In other words, what is the physical science term for a wave?

Oduvanchick [21]

A wave is a physical phenomenon characterized by its frequency, wavelength, and amplitude. in general waves transfers energy from one to another, in which case they have velocity

6 0

3 years ago

What is linear speed called when something moves in a circle

Dmitry [639]

Answer: Tangential Velocity

The tangential velocity $V$ is defined as the angular velocity $\omega$ by the radius $r$ of circular motion. As shown below:

$V=\omega. r$

Its name is due to the fact that this linear velocity vector is always tangent to the trajectory and is the distance traveled by a body or object in a circular movement in a period of time.

4 0

4 years ago

What happens to the magnitude of the momentum of an object if the mass of the object halved?<br>

nekit [7.7K]

Answer:

Momentum is directly proportional to velocity. If momentum of an object is doubled , but its mass does not increase (so velocity remains below the speed of light) then its velocity is doubled. If the velocity is doubled, then the kinetic energy increases by four times.

Explanation:

Hope it is helpful....

8 0

3 years ago

A 3 kilogram block is sliding across the ground at a velocity of 8 meters per second. What is the momentum of the block?

oksano4ka [1.4K]

Answer:

24 kgm/s

Explanation:

Momentum (p) = mass x velocity

Mass = 3kg , velocity 8m/s

momentum (p) = 3kg x 8m/s

= 24kgm/s

4 0

3 years ago