Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 55

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NEET

IMPORTANT

Earn 100

Which of the following diagrams correctly shows the relation between the terminal velocity $v_{T}$ of a spherical body falling in a liquid and viscosity $η$ of the liquid?

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Important Questions on Properties of Bulk Matter

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IMPORTANT

Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 56

What will be the approximate terminal velocity of a rain drop of diameter

1.8 \times 10^{- 3} m

, when density of rain water

\approx 10^{3} {kgm}^{- 3}

and the coefficient of viscosity of air

\approx 1.8 \times 10^{- 5} N - sm

^{- 2} ?

(Neglect buoyancy of air)

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Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 57

What is the terminal velocity of air bubble of

1.0 mm

in diameter rising in liquid of viscosity

0.85 N - s m^{- 2}

and density

900 kg m^{- 3}

?(air density

1.293 kg m^{- 3}, g = 9 m s^{- 2}]

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Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 58

The Young's modulus of a perfectly rigid body,

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Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 59

When a pressure of

100 atmosphere

is applied on a spherical ball, its volume reduces to

0.01 %

. The bulk modulus of the material of the rubber, in

dyne {cm}^{- 2}

, is

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Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 60

If

S

is the stress and

Y

is Young's modulus of material of a wire, the energy stored in the wire per unit volume is

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Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 61

The length of a metal wire is

l_{1}

when the tension in it is

T_{1}

and is

l_{2}

when the tension is

T_{2}

. The natural length of wire is

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Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 62

The stress-strain curves for brass, steel and rubber are shown in the figure. The lines $A, B$ and $C$ are for

Question Image

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Physics Crash Course NEET>Chapter 7 - Properties of Bulk Matter>Level 1>Q 63

A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied which stretches their combined length by

1 cm

. The two wires will have