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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionEasy2 minQB

PhysicsEasysingle choice

A steel ruler calibrated at 20° $C$ is used at 70° $C$ . It reads a temperature-stable line as 100 cm. With $α = 12 \times 1 0^{- 6} K^{- 1}$ , the true length is:

Options:

Answer:

Solution:

One marked centimetre now equals $1 + α Δ T = 1.0006$ true cm.

$L_{true} = 100 (1.0006) = 100.06 cm .$

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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