Question # 1

Worst absorber of heat is:

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Dull black surface

Coloured surface

Shinning silvered surface

White surface

The speed of satellites in GPS is:

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8.73 kms^-1

3.87 ms^-1

32 ms^-1

3.87 kms^-1

Weight of the body is due to the :

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Gravitation force

Centripetal force

Centrufugal force

All of the above

When 10 N along positive x-axis and 7 N along negative x-axis are added by head to tail rule. The resultant force is:

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17 N

10 N

7N

3 N

If mass of a body becomes half that its energy K.E will be reduce to:

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Zero

Half

Double

4 Times

If base of a right angle triangle is 3 cm and perpendicular is 4 cm. What is length of perpndicular?

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3 cm

2 cm

5 cm

10 cm

The device that is used to measure the temperature of a body called

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Thermometer

Acidimeter

Barometer

Clock timer

In circular motion, the motion of every particle of body is.

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Direction

Opposite

Same

None of these

A measuring cylinder is used to measure.

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Mass

Area

Volume

Level of liquid

Weight of the body when we increase its height from earth's surface.

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Increase

Decrease

Remain constant

None

If a liquid of mass 'm' requires thermal energy 'ΔQv' to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vapourization can be calculated as following:

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Hv = m/ΔQv

Hv = mΔQv

Hv = cmΔQv

Hv =ΔQv/m

During recent years the percentage of __________ increased considerably on earth:

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Carbon dioxide

Nitrogen

Oxygen

Methane

The unit of torque is:

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N

Nm

m

m/n

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