Question # 1

Land and Sea breezes are the results of:

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Conduction

Convection

Radiation

Conduction and radiation

Which surface is bad emitter:

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White surface

Black surface

Coloured surface

Silver surface

Forces on doubled arm spanner are called.

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Torque

Couple

Moment of force

Momentum arm

Kilowatt - hour is unit of _____________

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Power

Energy

Work

K.e

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 centripetal acceleration is always along.

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Normal force

Centripetal forces

Mass

Horizental forces

Amount of heat that flows in unit time is called:

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Rate of flow of heat

Q/t

Conductivity

Both A and B

The formula to determine the centripetal force is:

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Ms

mv²/r

Ns

Ns^-1

The formula of Density is:

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m/v

v/m

m x v

None of these

Heat reflected form the body depends upon :

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Colour and form

Form and speed

Color and speed

None

The direction of momentum is

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opposite to motion

Along the velocity

Perpendicular to motion

None of these

The earth temperature is :

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300 K

200 k

100 K

50 K

According to hook's law stress is directly proportional to :

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Area

Volume

Strain

Force

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