Using proper units is important when recording data. in this lab, you determined three properties of the objects: mass, volume, and density. what are the units for each property?
the units used for mass were .
the units used for volume were .
the units used for density were

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?

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.

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.