Question

Question: Entropy is often called the‘time’s arrow’ because it tells us the direction in which natural processes occur. If a movie is run backward, name some processes that you might see that would tell you that time is ‘running backward’.

Short answer

If a movie is played backward, we recognize a fired bullet moving backward into the gun.

Step-by-step solution

Meaning of an irreversible process 

An irreversible process may be defined as a thermodynamic process that cannot be reversed to maintain the system's initial state.

In this process, finite transitions happen in the system.

Processes that would tell you that time is ‘running backward’ 

If a movie is played backward, we recognize vehicle collisions and two crashed vehicles detached from each other, becoming unwracked as they detach.

We’ll see someone unwrite something on a section of the paper, run a pen above the paper, and get away with written marks as the pen progresses.