The human heart is a powerful and extremely reliable pump. each day it takes in and discharges about 7300 l of blood. assume that the work done by the heart is equal to the work required to lift that amount of blood a height equal to that of the average citizen of atlantic falls, approximately 1.6 m. the density of blood is 1050 kg/m3. what is the heart's power output in watts?

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.