Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoThermal ExpansionMedium2 minQB
PhysicsMediumsingle choice
A vertical glass jar is filled with water at 10°C. It has one thermometer at the top and another at the bottom. The central region of the jar is gradually cooled. It is found that the bottom thermometer reads 4°C earlier than the top thermometer. And the top thermometer reads 0°C earlier than the bottom thermometer. This happens because:
Options:
Answer:
C
Solution:
Water is densest at 4°C. Cooled water at 4°C sinks to the bottom, so the bottom reads 4°C first. Below 4°C the water gets less dense and stays up, so the top reaches 0°C first. Answer (C).
Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion
⏱ 2mℹ️ Source: QB
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