Question

A) the diameter of an artery is reduced by cholesterol build-up by 17%. By what percentage will the blood flow rate be reduced, assuming the same pressure difference?

B) You are watering your lawn with a hose when you put your finger over the hose opening to increase the distance the water reaches. If you are pointing the hose at the same angle and distance the water reach increases by a factor of three, what fraction of the hose opening did you block?

Answer 1