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Question
The shining surface in a thermos flask decreases the outgoing heat by ______.
Options
radiation
white
conduction
blue
convection
bad conductor
good conductor
black
reflection
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Solution
The shining surface in a thermos flask decreases the outgoing heat by reflection.
Explanation:
A shiny surface, like silver or polished metal, reflects the infrared radiation (heat) back into the flask rather than allowing it to escape. This reduces heat loss through radiation, helping the flask maintain its temperature for a longer period.
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