Question # 1

Mercury is used as thermometric material because it has

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Uniform thermal expansion

Low freezing point

Small heat capacity

All the above properties

Land and Sea breezes are the results of:

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Conduction

Convection

Radiation

Conduction and radiation

A body is said to be in __________ equilibrium if after a slight tilt return to its previous position:

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Stable

Unstable

Neutral

None

The kinetic energy of a body of mass 2 kg is 25J, its speed is

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5 ms-1

12.5 ms-1

25 ms-1

50 ms-1

The Earth attracts a body with a force equal to its:

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Velocity

Gravity

Weight

Mass

If the mass of moving body in a circle is doubled then centripetal force wil be:

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Doubled

Half

4 times

Same

Anything that rotates around a planet is called:

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Star

Sun

Moon

Satellite

If the object is at rest to T .............. W.

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=

=/

<

>

A straight line parallel to time-axis ona distance -time graph tells that the object is.

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Moving with constant speed

In motion

At rest

Moving with variable speed

A body has mass 986 Kg than W = ............... .

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9860 kg

9860 N

9860 m/s2

Nil

The slope of distance time graph shows.

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Speed

Displacement

Acceleration

Distance

in isolated system the momentum after collision of two bodies.

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Increase

Constnat

Decrease

Zero

Mathematically, % efficiency is defined as & nbsp

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Efficiency % required form or input/ total input energy x 100

Efficiency % input energy / output energy x 100

Efficiency % work / time x 100

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