Solar heating takes advantage of solar collectors such as the type shown in Fig. 11.22. During daylight hours, the average intensity of solar radiation at the top of the atmosphere is about 1400 W/m2. About of this radiation reaches the Earth during daylight hours. (The rest is reflected, scattered, absorbed, and so on.) How much heat energy would be received, on average, by the cylindrical collector shown in the figure during 10 h of day-light?
Answer to relevant QuestionsA large window measures 2.0 m by 3.0 m. At what rate will heat be conducted through the window when the room temperature is and the outside temperature is if (a) The window consists of a single pane of glass 4.0 mm thick ...A steel cylinder of radius 5.0 cm and length 4.0 cm is placed in end-to-end thermal contact with a copper cylinder of the same dimensions. If the free ends of the two cylinders are maintained at constant temperatures of 95oC ...The temperature of a lead block and a copper block, both 1.0 kg and at 20 oC, is to be raised to 100 oC. (a) The copper will require (1) more heat, (2) the same heat, (3) less heat than the lead. Why? (b) Calculate the ...A student challenges the second law of thermodynamics by saying that entropy does not have to increase in all situations, such as when water freezes to ice. Is this challenge valid? Why or why not? While playing in a tennis match, you lost 6.5 x 105 of heat, and your internal energy also decreased by 1.2 x 106J. How much work did you do in the match?
Post your question