A U-tube contains mercury of density 13.6ρ. Water of density ρ is poured into one arm to form a column of height h. The difference between mercury levels in the two arms is:
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A U-tube contains mercury of density 13.6ρ. Water of density ρ is poured into one arm to form a column of height h. The difference between mercury levels in the two arms is:

G1 Physics · Accepted Answer

At the same horizontal level in mercury, pressures are equal: ρgh=13.6ρgΔh. Thus Δh=h/13.6.