A vertical tube open to the atmosphere contains

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

A vertical tube open to the atmosphere contains, from top to bottom,

0.40\,\text{m}

of oil of density

700\,\text{kg/m}^3

and

0.50\,\text{m}

of water of density

1000\,\text{kg/m}^3

. Mercury of density

13\,600\,\text{kg/m}^3

is slowly added to the bottom of the tube so that it forms a third layer beneath the water. How much mercury must be added so that the absolute pressure at the bottom of the tube becomes

2.00\times10^{5}\,\text{Pa}

? (Take atmospheric pressure to be

1.01\times10^{5}\,\text{Pa}

.) (a)

0.80\,\text{m}

(b)

0.68\,\text{m}

(c)

1.44\,\text{m}

(d)

0.74\,\text{m}

Related theory

Pressure in Fluids
Fluid Statics
Fluids
Pressure in liquids
Fluid pressure and Pascal's law
Gravitation

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