Question # 1

A liquid surface tend to contract this phenomenon is due to

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Viscosity

Diffusion

Density

surface tension

halls fall faster than rain drops due to their

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Grater size

Greater mass

Greater area

Structure

The ratio of stress to strain is called.

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Bulk modulus

Young's modulus

Modulus of elasticity

Shear modulus

Molecules of a liquid

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Do not vibrate about their mean position

Are rigidly held with each other

Have weak attractive forces

Have strong attractive forces

The air plane lift is based on

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Archimedes principle

Law of conservation of momentum

Bernoulli's principle

Law of conservation of energy

The SI unit of viscosity is.

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Kg m -1 s-2

kg m-1 s-1

kg ms=-1

kg m s-2

Fluid mechanics is the study of how fluid move and the other ting involved is

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Energy

Velocity

Forces

Position

The buoyancy depends upon the

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Depth to which the body is immersed

Shape of the body

Mass of the body

Mass of the liquid displaced

Any alternations product in shape length of volume where a body is subjected to some external force is called

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Deformation

Polymerization

Crystallization

Elasticity

Soap cleans the dirty clothes because.

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Its chemical constituents are changed

Itr increases the surface tension of its solution with water

It increases the surface tension of its solution with water

It is less dense than that of water

When the deforming force applied on a body produces change in length then it is said to be

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Tensile stress

compression stress

Shear stress

Shear modulus

If a liquid does not wet a solid surface, the angle of contact is.

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Less than 90^o

Greeter than 180 ^o

90 ^o

Between 90 ^o and 180^o

Gases have

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Fixed shape

Fixed volume

Fixed shape and volume

No fixed shape and volume

The viscosity of an ideal fluid is

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Infinity

Unity

Zero

0.5

a body floats in liquid contained in a beaker The whole system falls freely under gravity The outthrust on the body due to liquids is

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Zero

Equal to the weight of the body in air

Equal to the weight of the liquid displaced

Equal to the weight of the immersed portion of the body

A structure that is intermediate between order and disorder is.

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glassy solids

Polymeric solids

Amorphous solids

Crystalline solids

A boat loving at constant speed 'v' through still water experiences a total frictional drag F what is the power developed by the boat.

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1/2 Fv

Fv

1/2 Fv2

Fv2

Minor losses through values, fittings, bends etc are modeled as proportional to

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Velocity head

Static head

total head

Pressure drop

Bernouli's equation includes as a special case of.

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Hook's law

Torricelli's therorem

Third law of motion

Archimedes principle

Blood is

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A compressible fluid

an incompressible fluid

Non viscous fluid

Not a fluid

The design of an airfoil uses

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Archimedes principle

Bernouli's principle

Pascal law

Hooke's law

The ratio of tensile stress to tensile strain is called.

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Shear modulus

Bulk modolus

Young's modulus

Elastic limit

The terminal velocity in case of spherical droplet is directly proportional to.

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Square of the radius of the droplet

Radius of the droplet

Cube of the radius of the droplet

Half of the Radius of the droplet half

The nib of fountain pan is split of convey ink down the nib by the phenomenon of.

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Adhesion

Cohesion

Osmosis

Capillary

the ratio of applied stress to volumetric strain is called.

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shear modulus

Bulk modulus

Young's modulus

elastic limit

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PPSC Physics Chapter 2 Structural Properties of Matter MCQs With Answers

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