A513 g ball strikes a wall at 12.1 m/s and
rebounds at 13.1 m/s. the ball is in contact
with the wall for 0.045 s.
what is the magnitude of the average force
acting on the ball during the collision?
answer in units of n.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.