Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

Their velocity increases and they fall with same velocity on the earth
Their velocity increases and they fall with different velocity on the earth
They fall with that ultimate velocity, which are different for different droplets
They fall with same ultimate velocity

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

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

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