Question # 1

In which of the following state molecules do not leave their position:

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Solid

Liquid

Gas

Plasma

hp stands for :

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1w

Horse power

Joule

All are true

The formula to determine the centripetal force is:

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Ms

mv²/r

Ns

Ns^-1

Specific heat for iron in joule per kilogram per kelvin is:

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387

920

470

903

The bad conductor of heat is:

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Iron

Copper

Air

Aluminum

Thermal conductivities of Lead

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23

30

35

85

Evaporation takes place from liquid :

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Everywhere

Above surface only

Below surface only

Middle of liquid

The altitude of geostationary orbits in which communication satellites are launched above the surface of the earth is;

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850 km

1000 km

6400 km

42300 km

Density of water is:

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100 kgm^-3

1000 kgm^-3

10 kgm^-3

1 kgm^-3

in isolated system the momentum after collision of two bodies.

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Increase

Constnat

Decrease

Zero

................ causes coastal breeze.

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Conduction

Convection

Radiation

Nil

Which types of friction is minimum?

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Sliding

Limiting

Rolling

None

Which surface is best reflector of heat?

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dull black surface

coloured surface

white surface

shining slivered surface

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