Question

A simple U tube contains mercury to the same level in both of its arms. If water is poured to a height of 20 m in one arm, how much will be the rise in mercury level in the other arm?

Answer 1

Answer:

The Pressure exerted by both mercury and water should be same

P

w

=P

m

⟹ρ

w

gh

w

=ρ

m

gh

m

⇒10

3

×10×0.136=13.6×10

3

×10×h

m

∴h

m

=1cm

Answer 2

Answer:

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