A train on a straigh, level track has a initial speed of 35 m/s . A uniform acceleration of 1.5 m/s2 is applied. How long did it take for the train gets the speed of 70 m/s?

What does the law of conservation of mass state?

Which of the following is the best name for mgcl2

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.