Question # 1

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

A black dull surface is a good ________ of heat:

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Emitter

Absorber

Reflector

Both A and B

In gases, heat is mainly transferred by

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Molecular collision

Conduction

Convection

Radiation

Which one is a good conductor?

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cotton

air

wool

iron

Which gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

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

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Conduction

Convection

Radiation

Nil

Feathers of bird give good thermal:

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Conduction

Insulation

Convection

None of these

Example of bad conductor is:

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Wool

Iron

Graphite

Gold

Leslie's cube is filled with:

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Cold water

Hot water

Mercury

Air

Heat reflected form the body depends upon :

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Colour and form

Form and speed

Color and speed

None

In gases, heat in mainly transferred by:

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Molecular collision

Conduction

Convection

Radiaiton

See breeze blows form sear to land during:

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day

night

after noon

morning

Worst absorber of heat is:

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Dull black surface

Coloured surface

Shinning silvered surface

White surface

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