Which description tells the length of time it takes for a planet to revolve around the sun? a )the length of its year   b.) the length of its day c.) the length of its month   d.) the length of its decade i think it's am i correct?

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.