Question # 1

A ball of mass 1 kg moving wih velocity 2 ms^-1 its momentum will be;

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1 Ns

2 Ns

0.5 Ns

4 Ns

The brids stretch out their wings and circle in the rising currents of hot air called

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conduction

convection

radiation

thermals

Which of the following affects evaporation?

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Temperature

Surface area of the liquid

Wind

All of the above

A Student claimed the diameter of a wire as 1.032 cm using vernier callipers. Upto what extent do your agree with it

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1 cm

1.0 cm

1.03 cm

1.032 cm

In which of the following state molecules don not leave their position?

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Solid

Liquid

Gas

Plasma

When a stress on a body crosses the limit, called the?

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Elastic limit

Plastic limit

Failure point

Breaking point

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

To find x component of force 'F' we use formul:

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F Sin 𝜽

F Cos 𝜽

F tan 𝜽

F/F1

In large building central heating system worms on the principle of

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conduction

convection

radiation

waves

The gravitational field exist _________ the earth.

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One direction

Upward

All aorund

Downward

Coefficient of friction between tyre and dry road is.

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0.6

1

0.05

0.2

Ability of body to do work due to its height is called.

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potential energy

kinetic energy

gravitational potential energy

elastic potential energy

Which of the following is an insulator?

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Wood

Glass

Plastic

Steel

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