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Question
The thermos bottles have a highly polished interior made of stainless steel, which makes them almost unbreakable. These thermos bottles also covered with insulated material to keep substances hot by reducing heat loss. Identify which of the following mode of heat transfer is restricted by the insulated material ?
The thermos bottles have a highly polished interior made of stainless steel, which makes them almost unbreakable. These thermos bottles also covered with insulated material to keep substances hot by reducing heat loss. Identify which of the following mode of heat transfer is restricted by the insulated material ?
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Solution
The correct option is B Radiation
A vacuum flask, or thermos, does not allow heat transfer by any of the three ways that heat can travel. The silver coating on the inner bottle prevents heat transfer by radiation, and the vacuum between its double wall prevents heat moving by convection. The thinness of the glass walls stops heat entering or leaving the flask by conduction. The case surrounding the flask provides additional insulation.
A vacuum flask, or thermos, does not allow heat transfer by any of the three ways that heat can travel. The silver coating on the inner bottle prevents heat transfer by radiation, and the vacuum between its double wall prevents heat moving by convection. The thinness of the glass walls stops heat entering or leaving the flask by conduction. The case surrounding the flask provides additional insulation.
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