Question

2. In thermometer when bulb comes in contact
with hot object, liquid inside it answer: Expands ​

Answer 1

Answer:

the liquid inside it is known as mercury

Explanation:

mercury used in thermometers

Answer 2

Answer:

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

Explanation:

• A thermometer is an instrument that is used to determine the body's temperature.
• Mercury is the liquid used in clinical thermometers.
• It is extensively used because it has a shiny look and can correctly monitor the temperature.
• It has an extremely high boiling point, making it ideal for measuring high-temperature substances.
• It expands consistently at all temperatures because it has a constant coefficient of expansion.
• Mercury has a volume coefficient of expansion of 0.00018, which means that for every degree of temperature increase, it grows by.018 percent in volume.
• A mercury thermometer has a metal reservoir and a thin glass capillary into which it may expand, making the difference clearer to observe.
• As the temperature rises, the mercury in the reservoir expands in volume, but the reservoir's walls confine it; it has nowhere else to go but into the thin column, which translates the minor volume change into a more visible linear change.
• Furthermore, it does not stick to the glass tube's surface.
• This expansion occurs because heat energy causes the atoms in a substance to vibrate more intensely, and the average distance between atoms rises. Materials shrink when temperatures drop for the same reason.

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