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

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Physics
Rainbows are produced when sunlight :

None of the given statements is correct.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.

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