Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

Concepts Of Physics MCQ Edition [Volume 1]

Exam: Concepts Of Physics MCQ Edition [Volume 1]
Subject: Physics
Chapter: Fluid Mechanics

Concepts Of Physics MCQ Edition [Volume 1] · Physics · Fluid Mechanics

Suppose water is used to construct a barometer. What will be the...

Suppose water is used to construct a barometer. What will be the height of the water column at standard atmospheric pressure (

76 \text{ cm}

of mercury)?

Options

A $1033.6 \text{ cm}$
B $1360 \text{ cm}$
C $5.59 \text{ cm}$
D $10.336 \text{ cm}$

Correct answer

A. $1033.6 \text{ cm}$

Step-by-step solution

At standard atmospheric pressure, the pressure exerted by the mercury column is equal to the pressure exerted by the water column.

\rho_{Hg} g h_{Hg} = \rho_{w} g h_{w}

Given

h_{Hg} = 76 \text{ cm}

,

\rho_{Hg} = 13.6 \text{ g/cm}^{3}

, and

\rho_{w} = 1 \text{ g/cm}^{3}

.

Substituting the values:

13.6 \times g \times 76 = 1 \times g \times h_{w}

h_{w} = 13.6 \times 76

h_{w} = 1033.6 \text{ cm}

Practice Fluid Mechanics on Quantrex Academy →

More from Fluid Mechanics

As depicted in the figure, the heights of the mercury surfaces in the two arms of a… Concepts Of Physics MCQ Edition [Volume 1]The surface of water in a water tank located on the top of a house is 4 m above the tap… Concepts Of Physics MCQ Edition [Volume 1]A glass filled completely with water has a bottom area of 20 cm^2 , a top area of 20 cm^2… Concepts Of Physics MCQ Edition [Volume 1]As shown in the figure, the cross-sectional area of the wider tube is 900 cm^2 . If the… Concepts Of Physics MCQ Edition [Volume 1]A glass filled completely with water has a bottom area of 20 cm^2 , a top area of 20 cm^2… Concepts Of Physics MCQ Edition [Volume 1]A glass full of water has a bottom area of 20 cm^2 , a height of 20 cm , and a volume of… Concepts Of Physics MCQ Edition [Volume 1]In a manometer, the heights of the mercury surfaces in its two arms are 2 cm and 8 cm .… Concepts Of Physics MCQ Edition [Volume 1]A glass full of water is enclosed by a jar, and the air within the jar is entirely… Concepts Of Physics MCQ Edition [Volume 1] Full Fluid Mechanics list All Concepts Of Physics MCQ Edition [Volume 1] PYQs