A 30 g ice cube at -30°C is dropped into a container of water at 0°C.
How much water freezes onto the ice? The
specific heat of ice is 0.5 cal/g °C and its heat
of fusion of is 80 cal/g.
Answer in units of g.

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.