1.

Refrigerator is to maintain eatables kept inside at 9^@C . If room temperature is 36^@Ccalculate the coefficient of performance.

Answer»

SOLUTION :Here `T_1 = 273 + 36 = 309 K` ,
`T_2 = 273 + 9 = 2832 K` .COEFFICIENT of PERFORMANCE.
`beta=T_2/(T_1T_2)=282/(309-282)=282/27=10.4`


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