Apiano is being pushed up a frictionless ramp that makes it 25° angle with the floor. if the piano weighs 510 pounds, and the force pushing the piano up the ramp is 240 pounds, what is the acceleration of the piano?

1. in terms of fuel economy rank the following hybrid and electric vehicles, and justify application specific to each hybrid technology stop/start | mild hybrid | full hybrid | plug-in hybrid | full electric a. rank based on fuel economy b. justify your application specific for each technology

Which component of the earth’s atmosphere is decreased due to photosynthesis?

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.