How to relate the features of thermometer in the construction of simple liquid in glass thermometer
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Answer:
Liquid-in-glass thermometers are based on the principle of thermal expansion of substances. A liquid in a glass tube (called a capillary) expands when heated and contracts when cooled. A calibrated scale can then be used to read off the respective temperature that led to the corresponding thermal expansion.
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In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
In the liquid-in-glass type thermometer, the thermometric property that is used is the length of the liquid that expands in the glass, usually mercury . Thermometric property is a physical property that changes with a change in temperature, and used to determine the temperature.