Asystem undergoes a two-step process. in step 1, it absorbs 50. j of heat at constant volume. in step 2, it releases 5j of heat at 1 atm. as it returned to its original internal energy. find the change in the volume of the system during the second step and identify it as an expansion or compression.

Expansion.

Explanation:

In step 1:

Since, volume is constant.

Therefore, Work Done , w=0.

q= 50\ J.

We know equation of thermodynamics,

Step 2:

Heat is released therefore,

As system returned to its initial state.

Therefore,

So, Work Done,

Also,

Therefore,

Since, is positive.

Therefore, it is expansion.

Hence, this is the required solution.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)