Complete the statement below with all that apply.
Acceleration is

Which of the following correctly describes the early view of catastrophism?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

If the new moon happens on january 15th, what shape will it be on february 6th?