SELECT * FROM question_mgmt as q WHERE id=3416 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=8 AND chapterId=111 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)
A refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36° C, calculate the coefficient of performance.
Temperature inside the refrigerator, T1 = 9°C = 282 K
Room temperature, T2 = 36°C = 309 K
Coefficient of performance = T1 / T2 - T1
= 282 / 309 - 282
= 282 / 27
= 10.44
Therefore, the coefficient of performance of the given refrigerator is 10.44.
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