Physics
A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

The liquid surface falls down on the direction of motion and rises up on the back side of the tank
The surface of the liquid remains horizontal
None
The liquid surface falls down only at the center of the tank

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

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