Question

A person typically contains 5.0 L of blood of density 1.05 g/mL. When at rest, it normally takes 1.0 min to pump all this blood through the body. (a) How much work does the heart do to lift all that blood from feet to brain, a sitance of 1.85 m? (b) What average power does the heart expend in the process? (c) The heart’s actual power consumption, for a resting person, is typically 6.0 W. Why is this greater than the power found in part b? Besides the potential energy to lift the blood, where else does this power go?

I would really appreciate help on not only the answer but how to get it. Thank you.

Answer 1