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Question

Which of the following is a reliable measure of hotness or coldness of a body?


A

Our sense of touch

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B

Dimension of the body

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C

Temperature

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D
Observing the change in colour of the body
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Solution

The correct option is C

Temperature


The dimension of a body has nothing to do with hotness or coldness. A body of large dimensions can be hot (for example the sun) or cold (like glaciers). Our sense of touch can be indicative but it is not a reliable way to judge the degree of hotness or coldness. Thus, temperature gives us an accurate idea whether a body is hot or cold.


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