A small amount of air is introduced into the vacuum above the mercury in a mercury barometer tube. The mercury level goes down because the air molecules

By: |Published on: Mar 23|Categories: Physics WAEC| 0 comments

A. heat the mercury and make it expand
B. increase the pressure above the mercury.
C. cool the mercury and make it contract.
D. decrease the pressure above the mercury

Correct Answer:

Option B – increase the pressure above the mercury.

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