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

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Physics
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

Should be made of a good conductor but can be of any shape
Should be in the form of a vertical rod
Can be of any shape
Should be made of a good conductor like copper with sharp-pointed edges

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