Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 3>Q 25

EASY

NEET

IMPORTANT

Earn 100

Terminal velocity of a steel ball of diameter $0.2 cm$ when falls through a tube filled with glycerine is $[g = 9.8 m s^{- 2},$ $density of steel = 8000 kg m^{- 3}$ $density of glycerine = 1330 kg m^{- 3}$ , $η = 8.33 poise$ $]$

100% studentsanswered this correctly

Important Questions on Properties of Bulk Matter

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 3>Q 26

A drop of radius

2 \times 10^{- 5} m

and density

1.2 \times 10^{3} kg m^{- 3}

falls through air. The viscosity of air is

1.8 \times 10^{- 5} N s m^{- 2}

. Neglecting buoyancy due to air, the terminal speed of the drop is

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 3>Q 27

If Reynold's number is greater than

3000

, the flow of liquid is

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 3>Q 28

Water is flowing through a tube of diameter

1 cm

at

8 cm s^{- 1}

. Taking

η = 10^{- 2} poise

the flow of liquid and Reynold's number are

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 3>Q 29

The terminal velocity of freely falling body is

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 3>Q 30

The velocity of water in the river is

9 km {hr}^{- 1}

of the upper surface. The river is

10 m

deep. If the coefficient of viscosity of water is

10^{- 2} poise

then the shearing stress between horizontal layers of water is

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 3>Q 31

A gas bubble of

2 cm

diameter rises through a liquid of density

1.75 g {cm}^{- 3}

with a fixed speed of

0.35 cm s^{- 1} .

Neglect the density of the gas. The coefficient of viscosity of the liquid is...

(Take g = 981 cm s^{- 2})