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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

A pellet moves at $200 m s^{- 1}$ and stops. Seventy-five percent of its kinetic energy heats it. With specific heat $500 J kg^{- 1} K^{- 1}$ , its temperature rise is:

Options:

Answer:

Solution:

$m c Δ T = \frac{0.75 m v ^{2}}{2}$ .

$Δ T = \frac{0.75 ( 200 ) ^{2}}{( 2 \times 500 )} = 30 K .$

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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