Part A A 5.00-m-diameter garden pond is 0.400 m deep. Solar energy is incident on the pond at an average rate of 400 W/m². If the water absorbs all the solar energy and does not exchange energy with its surroundings, how many hours will it take to warm from 16.0°C to 28.0°C ? ? 13.53 hours Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Review your calculations and make sure you round to 3 significant figures in the last step.

A diving bell is a 5.0 m-tall cylinder closed at the upper end but open at the lower end. The temperature of the air in the bell is 30 °C. The bell is lowered into the ocean until its lower end is 100 m deep. The temperature at that depth is 10°C. Part A How high does the water rise in the bell after enough time has passed for the air to reach thermal equilibrium? Express your answer with the appropriate units. h = Submit Part B μA Value Request Answer Units ? A compressed-air hose from the surface is used to expel all the water from the bell. What minimum air pressure is needed to do this? Express your answer with the appropriate units.

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Electronics and inhabitants of the International Space Station generate a significant amount of thermal energy that the station must get rid of. The only way that the station can exhaust thermal energy is by radiation, which it does using thin, 1.8-m-by-3.6-m panels that have a working temperature of about 6 °C and an emissivity of 0.85. Part A How much power is radiated from each panel? Assume that the panels are in the shade so that the absorbed radiation will be negligible. The temperature of deep space, which the panels face, is close to 0 K. Hint: Don't forget that the panels have two sides! Express your answer with the appropriate units. ► View Available Hint(s) P = Submit μA Value Previous Answers W .... ?