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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionEasy2 minQB

PhysicsEasysingle choice

The density of steel at $0^{\circ} C$ is $8.0 g / cc$ . At what temperature is density lesser by $0.1%$ . Coefficient of linear thermal linear expansion of steel is $1 0^{- 5} /^{\circ} C$ .

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Answer:

Solution:

For a fixed mass,
$ρ = \frac{ρ _{0}}{1 + 3 α Δ T}$
To first order,
$0.001 = 3 \times 1 0^{- 5} Δ T$
$Δ T \approx 33.3^{\circ} C$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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