# A U-tube contains

Figure showing heights of liquids in an U-Tube

Given:

Height of spirit column (h1) = 12.5 cm

Height of water column (h2) = 10.0 cm

Let P0 = Atmospheric pressure

ρ1 = density of the spirit

ρ2 = density of the water column

Pressure due to spirit column at B = P0 + ρ1gh1

Pressure due to water column at D = P0 + ρ2gh2

Pressure is equal at the points having the same height from the ground i.e. at points B and D.

P0 + ρ1gh1 = P0+ ρ2gh2

ρ1h1 = ρ2h2

We know that

Therefore specific gravity of spirit is 0.8.

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