Which of the following is the best explanation for speed? *
O
The amount of time it takes an object to move.
O
How fast an object moves,
O
What direction the object travels.
O
How long the object travels in a set amount of time.

What is the most useful equation for electric power?

Disney, viacom and aol time warner are examples of

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 •