1. Given that one can do 353 kJ of work with both arms while lieing on a bench. How high can you lift a mass of 90 kg?

2. A mass of 90 kg sits on top of a piston in a cylinder filled with 1 mole of an ideal gas at 1 atm and 298 K. What temperature change is required to lift the mass 0.1 m.

3.A 90 kg mass with a heat capacity of 100 kJ/kg - K is dropped from 40,000 m. What is the temperature change of the mass immediately after it hits the ground.

4. A hiker caught in a thunderstorm loses heat when her clothing becomes wet. She is packing emergency rations which if completely metabolized will release 30 kJ of heat per gram of rations consumed. How much rations must the hiker consume to avoid a reduction in body temperature of 4K as a result of heat loss? Assume the heat capacity of the body equals that of water and that the hiker weighs 55kg.