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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

A pendulum clock having time period $2 s$ keeps correct time at $2 5^{\circ} C$ . The pendulum is made of brass whose coefficient of linear expansion is $0.000019^{\circ} C^{- 1}$ . How many seconds in a day will it gain if the temperature falls to $0^{\circ} C$ ?

Options:

Answer:

Solution:

$\frac{Δ T _{p}}{T _{p}} \approx \frac{1}{2} α Δ θ$
For one day, time gained is
$86400 \times \frac{1}{2} \times 19 \times 1 0^{- 6} \times 25$
Time gained is $20.52 s$

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

⏱ 2mℹ️ Source: QB

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