How are distance and displacement similar and different?

Distinguish between a transverse wave and a longitudinal wave.

Ahockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player traveling east at 3.4 meters per second if the two players locked together momentarily in what direction will they be going immediately after the collision how fast will they be moving

Which is a substance that can be separated by physical means and is not the same throughout