Physics
The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by

1 MeV
0.1 MeV
100 MeV
10 MeV

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

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