The position of an object is given by x = bt3 a. if x and t are meters and seconds respectively, what are the units of b? b. what is the instantaneous velocity at time t? c. find the average velocity from t = 0 to t = t

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

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 •