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Q1. To pump 100Joules of heat from the ice cube tray of freezing water at 273K, out into a hot room at 310 K, the laws of thermodynamics say that you will need at least how many Joules of ordered energy or work?

Q2. A 50.0 kg (including the passenger) sled is subject to a net force of 20.0N pushing in the direction of the sled's motion as it is moving over a horizontal surface for a distance of 11.0 m after having started from rest. At this point the sled is released as it starts down a 10° incline. However, the snow is not very deep, and the sled stops after having moved an additional 35.0m. What is the work completed by friction while the sled is on incline?

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