Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

The rubber ball suffers greater change in momentum
The initial momentum of the rubber ball is greater than that of the metal ball
Both suffer the same change in momentum
The metal ball suffers greater change in momentum

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Physics
Why does the sea appear blue in colour?

Interference of the sun light from water surface
Reflection of the sun light from water surface
Refraction of the sun light
Scattering of the sunlight by water molecules

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Physics
Which of the following events occurred first ?

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

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