To lift a load of 200 N a distance of 2 m an effort of 25 N must be applied over an inclined plane of length 16 m. What must be done to lift the load 6 m, using the same effort?

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?