Explain any differences in the pulse rate at rest and after exercise ( in own words btw^^

Your heart is continuously beating to keep blood circulating throughout your body. Its rate changes depending on your activity level; it is lower while you are asleep and at rest and higher while you exercise—to supply your muscles with enough freshly oxygenated blood to keep the functioning at a high level.

Pulse rate depends on the activity we do, while exercising theres need of more oxygen so it increases but while at rest body requires less oxygen so low pulse rate.

c8h10 is your answerr

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.