Question

hygrometer instrument for measuring
a)The expansion of water vapour with temperature
b)the amount of oxygen in air
c)the amount of air
d)the amount of water vapour in the atmosphere​

Answer 1

Explanation:

A hygrometer is a device used to measure humidity. Many hygrometer products also measure temperature. A hygrometer that measures both humidity and temperature often is referred to as a thermo-hygrometer. PCE Instruments (PCE) offers a wide variety of hygrometer products used to measure the relative humidity of the air.

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