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Question

On a frigid winter night, a beggar wrapped himself in many layers of newspaper. This helped him stay warm because __________________________.

A
heat is produced by friction between the layers of newspaper
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B
air trapped between the layers of a newspaper is a poor conductor of heat
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C
the temperature of the newspaper is higher than the ambient temperature
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D
the temperature of the newspaper is lesser than the ambient temperature
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Solution

The correct option is B air trapped between the layers of a newspaper is a poor conductor of heat
A beggar wrapped himself with a few layers of newspapers on a cold winter night. When he wrapped the layers of newspaper, the air got trapped between those layers. We know that air is a bad conductor of heat. Thus, the air trapped between the layers of a newspaper does not allow the heat to flow.

Thus, the layers of newspaper helped the beggar to keep himself warm because the air trapped between the layers of newspaper is a bad conductor of heat.


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