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PHYSICS WAEC ANSWERS
(2a) Metal flat plate: It is a collector of heat that converts the radiant solar energy from the sun into heat energy by the process of greenhouse effect. (2b) Thermal Insulator: It prevents loss of accumulated heat in the solar collector and thereby improves its absorption efficiency. (2c) Tubes: They are use to capture almost all the sun's energy. It is the most effecient solar collector (1) Original length Lo = 3m Extension e = 310 = 3*3 = 9m F×e F = ke where k = 982.3NM-² F = 982.3*9 = 8840.7N The five that produce the extension F = 8.840.7N
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