If the average force exerted by peristalsis is 0.14 N, how much work does the small intestine do to move food along its entire length? Express your answer to two significant figures and include appropriate units.

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?

How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57×10−21 newtons?

First to answer will be the brainliest i need the answer asap