A 150 g baseball is thrown toward home plate with a speed of 30 m/s. The batter hits the ball directly back at the pitcher with a speed of 40 m/s. What is the change in momentum of the ball

the part of the wave he is travelling on is the crest

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

the inner core.

good luck: )

klicker

there are no atoms