JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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Application +4 | -1

Estimate the rate at which ice would melt in a wooden box

2.0 \mathrm{~cm}

thick and of inside measurements

200 \mathrm{~cm} \times 120 \mathrm{~cm} \times 120 \mathrm{~cm}

assuming that the external temperature is

30^{\circ} \mathrm{C}

and coefficient of thermal conductivity of wood is

0.0004 \mathrm{~cal} \mathrm{~s}^{-1} \mathrm{~cm}^{-1}{ }^{\circ} \mathrm{C}

View answer and explanation

Correct option: A

9.36 \mathrm{~g~s}^{-1}

Option A (

9.36 \mathrm{~g~s}^{-1}

) is correct because the rate of melting is calculated using the formula for heat transfer through conduction.

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