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How much heat (Btu's) will be stored in an 8 foot high by 40 foot long...

How much heat (Btu's) will be stored in an 8 foot high by 40 foot long concrete wall 1 ft. thick if it is warmed from 65 deg. F to 85 deg. F by exposure to sunlight?

a. 198,500 btu

b. 89,560 btu

c. 143,770 btu

d. 220,860 btu

e. 44,900 btu

Engineering   Electrical-Engineering   
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