Physics
Metals are good conductors of electricity because:

The atoms are lightly packed.
All of these
They contain free electrons.
They have high melting point.

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Physics
Solar eclipse will take place when

the moon does not lie on the line joining the sun and the earth
the sun is between the moon and the earth
the moon is between the sun and the earth
the earth is between the moon and the sun

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Physics
A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

B will reach the ground first.
A will reach the ground first.
The question is incomplete because the masses of the spheres are not given.
Both the spheres will reach the ground simultaneously.

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