Question # 1

In which hot liquid can remains hot:

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Glass

Lead

Thermos

Hot pot

At a height of 30 km, atmospheric pressure is:

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101300 Pa

1000 Pa

10000 Pa

101325 Pa

The direction of momentum is

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opposite to motion

Along the velocity

Perpendicular to motion

None of these

The formula of momentum is:

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P=Fa

P=mv

F=ma

F=mg

The force with which Earth attracts the object towards its center is known as

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Force

Weight

Mass

Gravity

Force per unit Area is :

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Pressure

Density

Efficiency

Nil

Metals are good conductor of heat dut to the:

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Free electron

Big size of their molecule

Small size of their molecules

Rapid vibrations of their atoms

The vector which has the same effect as the combined effect of vectors:

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Negative vector

The vector

Resultant vector

Zero vector

Which of following units is equal to Kgm² s^-2

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Newton

Joule

Watt

Coloumb

Rate of change of momentum equals:

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Displacement

Acceleration

^Force

Velocity

Anything that rotates around a planet is called:

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Star

Sun

Moon

Satellite

Coloured surface is a

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Best emitter

Good emitter

Bad emitter

Wrost emitter

The approximate weight of 80 gram mass on the surface of Earth is

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800 N

80 N

0.8 N

8 N

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