When the body temperature has reached 36°C, it is heated again so that it reaches to 40°C in 10 minutes. Assume that the rate of loss of heat at 38°C is the average rate of loss for the given time. Th

Question

When the body temperature has reached 36°C, it is heated again so that it reaches to 40°C in 10 minutes. Assume that the rate of loss of heat at 38°C is the average rate of loss for the given time. The total heat required from a heater by the body is :

TestHub · Accepted Answer

10 40 − 36 ​ = k ( 38 − 30 ) ⇒ k = 20 1 ​ min − 1 Q loss ​ = C k ( 38 − 30 ) ( 10 ) = 2 × 20 1 ​ × 8 × 10 = 8 J Q stored ​ = C ( 40 − 36 ) = 2 × 4 = 8 J Q heater ​ = 8 + 8 = 16 J Answer C.

Physics - Heat & Thermo Question with Solution | TestHub

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