Volumetric expansion is the working principle of the ______________ thermometers?
Correct answer: A. Mercury in glass
- A. Mercury in glass
- B. Constant volume gas
- C. Vapor pressure
- D. Bimetallic
Explanation
A mercury-in-glass thermometer works because mercury expands in volume when heated and rises through a calibrated capillary. Constant-volume gas thermometers instead infer temperature from pressure change.
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