Question # 1

Earth revolves around the:

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Moon

Sun

Glaxy

None

Absolute zero is equal to:

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0°C

-273°C

0°F

All

__________ forces have opposite direction:

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Unlike parallel

Parallel

Like parallel

None of these

The bad conductor of Heat is:

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Iron

Copper

Air

Aluminium

Water freezes at

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0oF

32oF

273 K

0 K

Transfer of heat by actual movement of molecules form hot place to cold place is called:

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Conduction

Convection

Radiation

None

The S.I unit of work is :

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J

N

Kg

m

The temperature at which a solid start melting is:

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Freezing point

Melting point

Fusion point

Both B and C

Leslie cube have faces:

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2

3

4

5

When ice is cooled below 0 ^oC it:

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Expand

Contracts

Boils

None of these

If force is capable of rotation a body in clockwise direction it is :`

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Clockwise

Anticlockwise

It has no direction

Nil

The mathematical formula of thermal conductivity is

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k =Q/t x L/A (T1 - T2)

k =Q/t x L/A (T1 + T2)

k =t/Q x L/A (T1 - T2)

k =2Q/t x L/A (T1 + T2)

In gases, heat is mainly transferred by

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Molecular collision

Conduction

Convection

Radiation

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