Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoThermal ExpansionMedium2 minQB
PhysicsMediumstatement
A glass stopper is stuck in a glass bottle. The neck of the bottle is wrapped in a warm cloth for a few seconds, and the stopper then comes out easily. The most accurate reason is:
Statement I: The neck warms and expands before the stopper has warmed, so the opening widens.
Statement II: The stopper contracts because of the heat.
Options:
Answer:
B
Solution:
Glass conducts heat slowly. The outside neck warms first and its bore enlarges while the stopper stays cool, so the fit loosens. Statement I is true and Statement II false. Correct option: (B).
Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion
⏱ 2mℹ️ Source: QB
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