Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoHeat TransferMedium2 min
PhysicsMediumsingle choice
Aluminium foil has one shiny and one dull side. To keep wrapped hot food warm as long as possible, the shiny side should be:
Options:
Answer:
A
Solution:
A shiny surface has a low emissivity, so it radiates less heat and reflects back what falls on it. With the shiny side out, the radiation loss of the food is smaller. A.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer
⏱ 2m
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