Physics
The scientist who first sent electromagnetic waves to distant places is

James Clerk Maxwell
John Logie Baird
Heinrich Hertz
Thomas Alva Edison

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Physics
Solids have definite shapes.This is because

The forces of cohesion of the molecules within are very much less in them
The forces of cohesion are very large
The forces of adhesion are large
The forces of adhesion are less

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

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