Question

in thermometer when bulb comes in contact with hot object, liquid inside it​

Answer 1

Answer:

The reason for rising of mercury is that it expands on heating, when we put the bulb of thermometer under our armpit the heat of our body is transfered to the bulb which is then transfered to mercury.

Explanation:

Answer 2

In a thermometer when the bulb comes in contact with a hot object, the liquid inside it expands.

Explanation:

• In a mercury thermometer, When a hot object comes in contact with a hot object the level of mercury rises.
• Mercury gets expanded on heating or in contact with hot objects, hence its level rises in the capillary.
• The bulb of the thermometer is made up of Mercury metal.  
• Thus the high coefficient expansion is due to its high boiling temperature.

• Liquid inside it expands when the bulb comes in contact with a hot object.

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