Question # 1

A piece of weighed wood just floats in water when placed in alcohol will

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Float lower

Float higher

Stay as before

Sink

Artificial polymers are made by a chemicals reaction known as.

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Crystallization

Electroplating

Polymerization

Polarization

Amorphous solids are also called.

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Crystalline solids

Glassy solids

Polymeric solids

Polymers

The dimensions of stress are

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[MLT-1]

[ML-1 T]

[ML-1T-1]

[ML-1T-2]

Viscosity of fluids with rise in temperature.

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Increases

Decreases

Remains constant

Vanishes

A fundamental equation in fluid dynamics that relates pressure to fluid speed and height is.

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Equation of continuity

Bernoulli's equation

Stoke's equation

Mass energy eqation.

Surface tension of a liquid may be defined as

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Heat energy per unit area

P.E. per unit area

surface energy per unit area

K.E. per unit area

A small and a large rain drops are falling thgouth all.

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Large drop falls faster

Both move with same velocity

Small drop falls faster

Small drop does not fall

Density of blood a

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Equal to water

Greater than water

Less than water

zero

When the deforming force applied on a body produces change in shape, thenit is said t be

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Tensile stress

Compression stress

Shear stress

Shear modulus

Birds planes and boats are streamlined to reduce

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Turbulence

Thrust

Drag

Lift

An alternation produced in shape length or volume when a body is subjected to some external force is.

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Deformation

Polymerization

Crystallization

Elasticity

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 dimensions of strain are.

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[MLT-2]

[ML-1T-2]

[ML-2T-3]

It is a dimensionless quantity

For which position, will the maximum blood pressure in the body have the smallest value.

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Standing up right

Sitting relaed

Lying horizontally

Standing on one's head

A hydrometer floats to a particular level in sea water in fresh water it.

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Floats lower

Sinks completely

Floats higher

Floats at the same level

A liquid surface tend to contract this phenomenon is due to

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Viscosity

Diffusion

Density

surface tension

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 lowest stress at which strain increases in stress in called.

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elastic limit

Plastic limit

Yield point

Bulk strength

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