What does the steadiness of the mercury column of the thermometer indicates?
Answers
Answer :
The mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam (1714).
It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb.
The volume of mercury changes slightly with temperature; the small change in volume drives the narrow mercury column a relatively long way up the tube.
The space above the mercury may be filled with nitrogen gas or it may be at less than atmospheric pressure, a partial vacuum.
In order to calibrate the thermometer, the bulb is made to reach thermal equilibrium with a temperature standard such as an ice/water mixture, and then with another standard such as water/vapour, and the tube is divided into regular intervals between the fixed points..
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Answer:
flow of heat between the thermometer liquid(mercury)
Explanation:
- water has stopped
- thermal equilibrium has been attained between the water and thermometer liquid