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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferHard2 min

PhysicsHardmultiple choice

Two experiments use a copper rod and a steel rod of identical dimensions between a container of boiling water and a container of ice. With copper alone all the ice melts in 12 minutes, and with steel alone in 36 minutes. When both are used in series the ice melts in $t_{s}$ , and when both are used in parallel in $t_{p}$ . Which statements are correct?

Options:(select one or more)

Answer:

A, C

Solution:

The melting time is proportional to the thermal resistance. In series: $12 + 36 = 48$ minutes. In parallel: $\frac{1}{t _{p}} = \frac{1}{12} + \frac{1}{36} = \frac{4}{36}$ , so $t_{p} = 9$ minutes. A and C.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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