What is the red substance found in some kinds of thermometers?
Answer:
Alcohol thermometer - thermometer consisting of a glass capillary tube marked with degrees Celsius or Fahrenheit and containing alcohol which rises or falls as it expands or contracts with changes in temperature.
Alcohol is a good liquid to use in a thermometer because it remains a liquid over most of the normal temperatures found on the Earth's surface. You will sometimes use alcohol thermometers in school. The alcohol is often coloured red or green in these thermometers so that the liquid can be seen more easily. However, alcohol is not much use at hot temperatures because it boils at about 80°C, which is quite a low temperature.
Mercury
mercury
alcohol with red dye added to help you see it.
Early thermometers used water, but because water freezes there was no way to measure temperatures less than the freezing point of water. So, alcohol, which freezes at temperature below the point where water freezes, was used.
The red colored or silver line in the middle of the thermometer moves up and down depending on the temperature. The thermometer measures temperatures in Fahrenheit, Celsius and another scale called Kelvin. Fahrenheit is used mostly in the United States, and most of the rest of the world uses Celsius. Kelvin is used by scientists.
For those who thought it was mercury: that's where the material at the bottom, as well as in teh lline showing the measurement is SILVER.
It its a new thermometer, its alcohol. If its 15 years or older it could be mercury.
yeah.the red substance is alcohol...well alcohol stained with red dye..
in other thermometers the silvery substance in the thermometer is mercury !
alcohol with red dye added
Mercury!! Transparent is alcoholic substance..
It is probably Mercury, not dyed alcohol.
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