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Look at an ordinary thermometer. You will see the Mercury or achohol inside, and you will see regular degree markings along the thermometer. As the mercury or alchohol changes temperature, it expands and contracts.

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12y ago
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12y ago

Well, when the temperature increases the liguid expands:) yahhh im a smartie:P

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9y ago

The thermal expansion of a material is proportional to the temperature and the thermometer is calibrated.

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Q: How do liquid-filled thermometers measure temperature based on thermal expansion?
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How do thermometers with in liquid in glass measure temperature?

Such thermometers are based on the fact that the liquid expands when the temperature increases. That's what the thermometers measure.


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Digital thermometers measure electrical resistance and Mercury thermometers measure thermal expansion.


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