A. Relative density of liquid
B. Pressure in liquids and gases
C. Humidity
D. Atmospheric pressure
Correct Answer:
Option B – Pressure in liquids and gases
Explanation
a manometer is used to measure pressure in liquids and gases. Manometer gauges measure the pressure of gases and vapors from atmospheric to about 1 Pa by balancing the force exerted by the gas or vapor against the weight of a column of liquid, usually mercury, water, or oil.
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