EASY
Agniveer Vayu
IMPORTANT
Earn 100

The relative velocity of two parallel layers of water is 8 cm s-1. If the perpendicular distance between the layers is 0.1 cm, then velocity gradient will be

75.56% studentsanswered this correctly

Important Questions on Mechanical Properties of Fluids

MEDIUM
Agniveer Vayu
IMPORTANT
Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 6
The velocity of water in river is 18 km h-1 near the surface. If the river is 5 m deep, then the shearing stress between the surface layer and the bottom layer is (coefficient of viscosity of water, η=10-3 Pa s)
MEDIUM
Agniveer Vayu
IMPORTANT
Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 7
In an experiment to verify Poiseuille's law η=π ∆p a48 l V where the symbols have their usual meanings, the maximum error that enters in calculating the coefficient of viscosity η is due to measurement of
EASY
Agniveer Vayu
IMPORTANT
Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 1
A 20 cm long capillary tube is dipped vertically in water and the liquid rises upto 10 cm. If the entire system is kept in a freely falling platform, the length of water column in the tube will be
EASY
Agniveer Vayu
IMPORTANT
Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 10 - Mechanical Properties of Fluids>Exercise>Q 2

Which water is having detergent dissolved in it
Question Image

EASY
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 ρ 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? Surface tension=T -
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 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 -
EASY
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