Question

it expands on heating and we use it in thermometer what is it​

Answer 1

Answer:

it is mercury Hg.........

Answer 2

Answer:

When we think of a thermometer, one might visualize a thin glass tube with a colorful liquid in it (that lines up with a certain measurement on the thermometer). The tube is thin to allow a more precise reading. You can think of it this way: Imagine trying to suck up liquid through a thin straw and a wide straw. The liquid will go up quicker in the thin straw, because it has less space to move around in. The same is true with a thermometer. The tube is so thin that the liquid can either move up or down. And this is where thermal expansion comes in.

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