Question

Three similar mercury barometers are filled with mercury and are inverted and the open ends are...

Three similar mercury barometers are filled with mercury and are inverted and the open ends are lowered to a container containing Mercury.

The height of the closed end from the mercury level in the container of all three barometers are 100 cm and the level of the Mercury column is 75 cm.

A liquid which is easily vaporizing is inserted to the second barometer and the Mercury column falls by 5 cm. The same liquid is inserted to the third barometer  

until a small amount of the liquid remains above the mercury and the column falls by 10 cm.

When the temperature is kept constant and the atmospheric pressure is increased by 2 cmHG what will be the new observed heights of the three barometers?

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