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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferHard2 min

PhysicsHardnumerical

The temperature of a liquid drops from 360 K to 356 K in 2 minutes in a room at 290 K. Find the time in seconds for it to drop from 340 K to 338 K (one decimal).

Answer:

83.30

Solution:

First: $\frac{4}{120} = k (358 - 290)$ , so $k = \frac{1}{2040}$ . Second: $\frac{2}{t} = k (339 - 290)$ , so $t = \frac{2 \times 2040}{49} = 83.3$ s.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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