Physics
The angle in which a cricket ball should be hit to travel maximum horizontal distance is :

30° with horizontal
60° with horizontal
15° with horizontal
45° with horizontal

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

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

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