Jamal wanted only to test the effect of the free fall and so he put his system in a vacuum to prevent air resistance. in free fall, will the crumpled or flat paper reach the ground first?

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?

Which situation will produce the greatest change of momentum

Since the energy was not raising the temperature of the water during these segments, what was the energy used to do instead? your answer must include an explanation of what is happening to the molecules.