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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

A metal ball immersed in a liquid weighs $W_{1}$ at 20°C and $W_{2}$ at 60°C. The cubical expansion coefficient of the metal is greater than that of the liquid. Then:

Options:

Answer:

Solution:

$W = m g (1 - ρ_{l} / ρ_{s})$ , and $ρ_{l} / ρ_{s} \propto \frac{1 + y _{s} Δ T}{1 + y _{l} Δ T}$ rises when $γ_{s} > γ_{l}$ , so $W$ falls: $W_{1} > W_{2}$ . Answer (A).

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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