41. The air pressure at the foot of a hill is 760mm of mercury. The height of the hill is given as 1360m and the density
of mercury is 13600 kgm? Calculate the density of air.

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.