Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>BEGINNER'S BOX - 2>Q 8

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Earn 100

Calculate the surface energy of ring floating on the liquid surface? (surface tension of liquid is $75 {Nm}^{- 1}$ and area of ring is $0.04 m^{2}$ )

Important Questions on Viscosity and Surface Tension

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>BEGINNER'S BOX - 3>Q 1

10^{6}

tiny drops coalesce to form a big drop. The surface tension of liquid is

T

. Calculate the percentage fractional energy loss.

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>BEGINNER'S BOX - 3>Q 6

An air bubble of radius

0.02 mm

is at a depth of

25 cm

in oil of density

0.8 g {cm}^{- 3}

. If the surface tension of oil is

25 \times 10^{- 3} N m^{- 1}

, find the pressure inside the bubble (atmospheric pressure

= 10^{5} N m^{- 2}

) ?

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 1

Water rises in two capillaries of same material up to heights of

40 and 60 mm

. Find the ratio of their radii ?

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 2

When a capillary tube is dipped inside water, water rises inside the capillary tube up to

0.015 m

. If the surface tension of water is

75 \times 10^{- 3} N m^{- 1}

, calculate the radius of the capillary tube ?

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 3

A small drop of water falls from rest through a large height

h

in the air. The final velocity is _____.

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 7

The velocity of falling raindrops attains a limiting value, because of:

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 9

Two rain drops falling through air have radii in the ratio

1 : 2

. They will have terminal velocity in the ratio________

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 10

A sphere of mass

M

and radius

R

is falling in a viscous fluid. The terminal velocity attained by the falling object will be proportional to