Question # 1

Which of the substance is the lightest one?

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Copper

Mercury

Aluminim

Lead

Thermoflask is used maintain:

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Heat

Temperature

Density

Pressure

Which surface is bad emitter:

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White surface

Black surface

Coloured surface

Silver surface

At sea level height if mercury is:

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1000 cm

10 cm

1m

76 cm

The base quantity is.

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Volume

Torque

Mass

Momentum

S.I unit of force is:

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N

Ns

s

None

The speed geostationary satellite with respect to earth is:

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8.33 kms^-1

3.87 ms^-1

32 ms^-1

Zero

In falling object potential energy is covered to:

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K.E

Force

P.E

Nil

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

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Force

Weight

Mass

Gravity

Which types of friction of maximum

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Sliding

Rolling

Both a and b

None

Most of the matter that fills the universe is in state:

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Solid

Plasma

Liquid

Gas

According to Archimedes, up thrust is equal to :

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Weight of displaced liquid

Volume of displaced liquid

Mass of displaced liquid

None of these

The braking system of cars, buses etc also works on

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Newton's law

Pascal law

Faraday law

Bohr's law

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