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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumsingle choice

Four spheres $A$ , $B$ , $C$ , $D$ of different metals have the same radius and are at the same temperature. The ratios of their densities are 3 : 2 : 4 : 5 and of their specific heats 4 : 5 : 2 : 3. Which sphere cools fastest at the start?

Options:

Answer:

Solution:

Rate of cooling $\propto \frac{1}{ρ c}$ . Products: $A = 12$ , $B = 10$ , $C = 8$ , $D = 15$ . The smallest is $C$ , so $C$ cools fastest.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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