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

10 MeV
1 MeV
0.1 MeV
100 MeV

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Physics
Which of the following events occurred first ?

Albert Einstein propounded the General Theory of Relativity
Max Planck unveiled the Quantum Theory
Marconi first tranmitted a wireless signal
Madame Marie Curie became the first woman Nobel Prize winner

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Physics
The blue colour of water in the sea is due to

Reflection of blue sky by sea water
Scattering of blue light by water molecules
Absorption of other colours except blue by water molecules
Reflection of blue light by impurities in sea water

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Physics
Water pipes in hilly areas often burst on a cold frosty night, because

Frost makes the pipes rusty, so they break
None of these
Water in the pipes freezes and on freezing water expands, so pipes break
The material of which pipes are made contracts due to cold and so breaks

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