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Agniveer Vayu
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A very narrow capillary tube records a rise of 20 cm 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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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 5
If a liquid does not wet glass, its angle of contact is:
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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 A9, 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)
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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 -
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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 -
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Agniveer Vayu
IMPORTANT
Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 11
In a capillary tube, water rises to a height of 4 cm. If the cross-sectional area of the tube were one-fourth, water would have risen 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 12
The surface tension of the soap solution is 0.03 N/m. The work done in blowing to form a soap bubble of surface area 40 cm2, (in J), is