Physics
Burns caused by steam are much severe than those caused by boiling water because

Temperature of steam is higher
Steam is gas and engulfs the body quickly
Steam has latent heat
Steam pierces through the pores of body quickly

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Physics
Skating on ice is possible because

Ice is cold
The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
The surface of ice is smooth
The pressure on the ice due to skate raises its melting point

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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 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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