Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoThermal ExpansionMedium2 minQB
PhysicsMediumassertion reason
Assertion: Fog often disappears after sunrise.
Reason: Warming can raise saturation vapour pressure and allow droplets to evaporate.
Options:
Answer:
A
Solution:
Fog is tiny water droplets suspended in air near the dew point. After sunrise the ground and air warm up. Warmer air can hold more vapour (higher saturation vapour pressure), so droplets evaporate; sunlight and rising air also disperse the fog. Both are true. The Reason gives the physical cause of the Assertion. Correct option: (A).
Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion
⏱ 2mℹ️ Source: QB
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