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HW10-19c-20 - 6-14 Binary Nuclear Reactions Chap 6(c The...

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6-14 Chap. 6 Binary Nuclear Reactions (c) The earth is about Re = 93 X 106 mi = 1.50 X 1013cm from the sun. A sphere with this radius has a surface area of A = 47r R~ = 2.81 X 1027 cm2. The radiant power crossingthis spherical surface is P 8 or the energy flux per unit area is -4 X 1026 W -2.81 X 1027 cm2 = 0.142 W fcm2, solar constant = Ps 47rR2 e 20. Explain how electricity generated from hydroelectric power, wind turbines, coal-fired power plants, and nuclear power plants are all indirect manifestations of fusion energy generated in stars. Solution: Fusion reactions in stars (and our sun) result in radiant energy flowing into space. Solar energy absorbed and reflected by our atmosphere causes our weather. The heating of the atmosphere causes convective currents or winds
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