Use the formula,

where
is the cart's displacement (from the origin),
is its initial speed,
is its acceleration, and
is time.


Alternatively, since acceleration is constant, we have

That is, we have these two equivalent expressions for average velocity, where
is the cart's final velocity. Solve for
:


Answer:


Explanation:
The net work of the cycle is the sum of works in each process.
<u>For the first process 1-2: </u> Let's apply the work definition.
(1)
Now, we need the pressure. We know that pV=C, where C is a constant. Then ![p_{1}V_{1}=10^{5}2=2*10^{5} [J]](https://tex.z-dn.net/?f=p_%7B1%7DV_%7B1%7D%3D10%5E%7B5%7D2%3D2%2A10%5E%7B5%7D%20%5BJ%5D)
So 
Let's put p in (1):

Using the first law of thermodynamics we can find Q.

<u>Second process 2-3</u>
In this case, we have a constant volume, so the work done here is 0.

<u>Third process 3-1</u>


Finally, the net work is:

By the conservation of energy:

Because there is no change in total energy.
So:

It is a refrigerator because the net work is negative, it means it consumes energy.
I hope it helps you!
<span>The answer would be weightless. The occurrence of "weightlessness" happens when there is no force of support on your body. When your body is efficiently in "free fall", quickening downward at the acceleration of gravity, then you are not being maintained.</span>
If 'C' and 'R' represent capacilance and resistance respectively then the dimensions of RC are:
A:M^0L^0T^2
B:M^0L^0T^1
C:Ml^1
D:Ml^-1T^2
E;None of these
Answer:
0.48N
Explanation:
according to the second law of motion
force=mass×acceleration
the mass in this question is 0.025,the acceleration 19
therefore f=0.025×19
=0.48N
I hope this helps