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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediuminteger

A black rectangle of 6 cm $\times$ 3 cm at $2 7^{\circ}$ C emits energy $E$ per second. Its length and breadth are halved and the temperature is raised to $32 7^{\circ}$ C. Find the new emission in units of $E$ .

Answer:

Solution:

The area becomes $\frac{1}{4}$ and $T^{4}$ rises by $2^{4} = 16$ . The emission is $\frac{16}{4} E = 4 E$ .

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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