Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 1

MEDIUM

11th Telangana Board

IMPORTANT

Earn 100

Calculate the work done in blowing a soap bubble of diameter $0.6 cm$ against the surface tension force. ( Surface tension of a soap solution $= 2.5 \times 10^{- 2} {Nm}^{- 1}$ )

Important Questions on Mechanical Properties of Fluids

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 2

How high does methyl alcohol rise in a glass tube of a diameter

0.6 cm

? (surface tension of methyl alcohol

= 0.023 N m^{- 1}

and density

= 0.8 gm / {cm}^{3}

. Assume that the angle of contact is zero.)

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 3

What should be the radius of a capillary tube if water has to rise to a height of

6 cm

in it? (Surface tension of water

= 7.2 \times 10^{- 2} N / m

).

MEDIUM

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 4

Find the depression of the meniscus in the capillary tube of diameter

0.4 mm

dipped in a beaker containing mercury. (Density of mercury

= 13.6 \times 10^{3} kg / m^{3}

and surface tension

= 0.49 {Nm}^{- 1}

and angle of contact

= 135 °

)

EASY

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 5

If the diameter of a soap bubbles

10 mm

and its surface tension is

0.04 N / m

. Find the excess pressure inside the bubbles.

EASY

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 6

If work done by an agent to form a bubble of radius

R

is

W

, then how much energy is required to increases its radius to

2 R

.

HARD

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 7

If two soap bubbles of radii

R_{1} and R_{2}

(in vacuum) coalesce under isothermal conditions. What is the radius of the new bubble? Take

T

as the surface tension of soap solution.

EASY

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 11.1

Explain why

The blood pressure in humans is greater at the feet than at the brain

EASY

11th Telangana Board

IMPORTANT

Intermediate First Year Physics>Chapter 11 - Mechanical Properties of Fluids>EXERCISES>Q 11.1

Explain why,

Atmospheric pressure at the height of about $6 km$ decreases to nearly half of its value at the sea level, though the height of the atmosphere is more than $100 km$ .