Question

In a mercury thermometer, the level of mercury rises when its bulb

comes in contact with a hot object. What is the reason for this rise in the

level of mercury
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Answer 1

Explanation:

In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object because mercury is heat sensitive and expandable.

When mercury come in the contact of hot temperature. It gain temperature and starting expanding.

Answer 2

Explanation:

In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object because when the temperature rises, the mercury in the bulb expands and rises into the the thin tube called the stem of the thermometer as mercury is a liquid.