MEDIUM
7th CBSE
IMPORTANT
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Why a clinical thermometer has kink or constriction in the glass tube?

Important Questions on Heat

EASY
7th CBSE
IMPORTANT
Why a clinical thermometer can measure only a short range of temperature?
EASY
7th CBSE
IMPORTANT
We can only use clinical thermometer to measure the body temperature. Why?
EASY
7th CBSE
IMPORTANT
Why do birds put up their feathers in winter?
EASY
7th CBSE
IMPORTANT
In a winter night, the cloudy sky makes us feel warmer than the clear sky. Explain, why?
EASY
7th CBSE
IMPORTANT
An ordinary glass cracks if very hot tea is poured into it. But when we put a spoon inside the glass, it does not break- why?