1. A 56.6-kg sky diver jumped out of an airplane at an altitude of 0.900 km. She opened her parachute after a while and eventually landed on the ground with a speed of 4.20 m/s. How much energy was dissipated by air resistance during the jump?
2. A 6.60-kg steel ball at 26.1C is dropped from a height of 24.3 m into an insulated container with 4.50L of water at 10.1C. If no water splashes, what is the final temperature of the water and steel? The specific heat of steel and water is 450 J/(kgK) and 4186 J/(kgK) respectively.
3. Tina is going to make iced tea by first brewing hot tea, then adding ice until the tea cools. Ice, at a temperature of ?10.0C, should be added to a 3.30 10^?4m³glass of tea at 95.0C to cool the tea to 10.0C.The glass has a mass of 0.350 kg and the specific heat of the glass is 0.837 kJ/(kgK). Specific heat capacity (15.0C) of water is4.186 kJ/(kgK) andheat of fusion of water is333.7 kJ/kg.Specific heat capacity of ice is 2.10kJ/(kgK). Find the mass of the ice required to cool the tea to 10.0C,without ignoring the temperature change of the glass.
4. A wall consists of a layer of wood and a layer of cork insulation of the same thickness. The temperature inside is 30.0C, and the temperature outside is 0.0C. The thermal conductivity of wood is 0.130 W/(mK) and the thermal conductivity of cork is 0.0460 W/(mK).

T = ? T = ? Outside Inside Outside Inside T= 0.0 C T = x'C T= 0.0.C T = XC Wood Cork Cork Wood where X = 30.0