Question

Explain the thermal equilibrium as a working principle of liquid thermometer?

Answer 1

Answer:

Two physical systems are in thermal equilibrium if there is no net flow of thermal energy between them when they are connected by a path permeable to heat. ... A system is said to be in thermal equilibrium with itself if the temperature within the system is spatially uniform and temporally constant.

Answer 2

Thermal equilibrium as a working principle of liquid thermometer.

Explanation:

• Two physical systems are in thermal equilibrium if there is no net flow of thermal energy between them when they are connected by a path permeable to heat.
• Liquid thermometers are based on the principle of thermal expansion of substances.
• A thermometer measures temperature through a glass tube sealed with mercury that expands or contracts as the temperature rises or falls.
• A liquid in a glass tube expands when it heated and contracts when cooled.

• It is widely used for its accuracy in temperature.