Question # 1

The main source of energy in the unierse is:

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Moon

Stars

Sun

Planets

_______________ was a pupil of Galileo.

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Einstein

Robert

Al Razi

Torricelli

Mass of earth is Me is :

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Me = 6× 1024 kg

6× 1024 kg

7× 1024 kg

6× 1024 Mg

The Young's Modulus of Rubber is:

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1.40 ×106 N/m2

1.6× 106 N/m2

1.4 × 107 N/m2

0.40 × 108 N/m2

In Einstein's mass-energy equation, c is the

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Speed of sound

Speed of light

Speed of electron

Speed of Earth

The bad conductor of Heat is:

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Iron

Copper

Air

Aluminium

A mass of a body:

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Decreases when accelerated

Increases when accelerated

Decreases when moving with velocity

None of the above

Kinetic energy of the molecules depends on its:

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Temperature

Surface are

Density

Volume

Convection of heat is a process of heat transfer due to;

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Random motion of molecules

Downward motion of molecules

Upward motion of molecules

Free motion of molecules

Amount of substance in terms of numbers is measured in.

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gram

Kilogram

Newton

Mole

What of the following is a god radiator of heat?

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a Shinning silvered surface

a dull black surface

a white black surface

a shinning colored surface

The example of bad conductor is:

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Wool

Copper

Gold

Iron

Einstein's mass-energy equation relation is:

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E =1/2 mc²

E =mc²

E =m²c

E = 2 mc²

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