Physics
The swing of a spinning cricket ball in air can be explained on the basis of

Sudden change in wind direction.
Buoyancy of air.
Turbulence caused by wind.
Bernoulli's theorem.

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Physics
The sky appears blue because

All colours interfere to produce blue
The atmosphere scatters blue colour more than the others
It is actually blue
In white light, the blue component dominates

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

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