Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. what effect does this have on collisions? the change in momentum needed to stop the gymnast is increased. the change in momentum needed to stop the gymnast is decreased. the force exerted by the floor on the gymnast decreases. the force exerted by the floor on the gymnast increases.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?