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

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

ANSWER DOWNLOAD EXAMIANS APP

Physics
Ice is packed in saw dust because

Saw dust will not get melted easily.
Saw dust is poor conductor of heat.
Saw dust does not stick to the ice.
Saw dust is a good conductor of heat.

ANSWER DOWNLOAD EXAMIANS APP

Physics
A hydrogen balloon floats up because of

Air pressure decreases with decrease in height
The pressure inside the balloon is more than the pressure outside it
Weight of the balloon is less than the weight of air displaced by it.
Air pressure decreases with decrease in weight

ANSWER DOWNLOAD EXAMIANS APP