Which water is having detergent dissolved in it

Important Questions on Mechanical Properties of Fluids

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Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 3

In the bottom of a vessel with mercury of density $\mathrm{\rho }$ there is a round hole of radius $r$ . At what maximum height of the mercury layer will the liquid still not flow out through this hole? $\left(\text{Surface tension}=T\right)$ -

EASY

Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 4

A very narrow capillary tube records a rise of $20\mathrm{ }\mathrm{c}\mathrm{m}$ when dipped in water. When the area of cross-section is reduced to one-fourth of former value, water will rise to a height of -

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Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 5

If a liquid does not wet glass, its angle of contact is:

EASY

Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 6

Two mercury drops (each of radius $r$) merge to form a bigger drop. The surface energy of the bigger drop, if $T$ is the surface tension, is

EASY

Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 7

In a capillary tube having area of cross-section $A$, the water rises to a height $h$. If the cross-sectional area is reduced to $\frac{A}{9}$, the rise of water in the capillary tube is

EASY

Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 8

An air bubble of radius 1 mm is formed inside water at a depth 10 m below free surface (where air pressure is 10⁵ N/m²). The pressure inside the bubble is

(Surface tensiion if water = 7 x 10^-2 N/m)

EASY

Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 9

A water drop is divided into eight equal droplets the pressure difference between the inner and outer side of the big drop will be -

EASY

Agniveer Vayu

IMPORTANT

Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 10

The work done to get 'n' smaller equal size spherical drops from a bigger size spherical drop of water is proportional to -