Two bodies at 9 0 ∘ C and 7 0 ∘ C are in surroundings at 3 0 ∘ C. Find the ratio of their initial rates of cooling, first to second.

The rate of cooling ∝ excess temperature: 40 60 = 1.5 . C.

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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferEasy2 min

PhysicsEasysingle choice

Two bodies at $9 0^{\circ}$ C and $7 0^{\circ}$ C are in surroundings at $3 0^{\circ}$ C. Find the ratio of their initial rates of cooling, first to second.

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Answer:

Solution:

The rate of cooling $\propto$ excess temperature: $\frac{60}{40} = 1.5$ . C.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

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