Physics
Alcohol is more volatile than water because ________ is lower than water.

Its boiling point
Its viscosity
Its surface tension
Its density

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Physics
Solar eclipse will take place when

the earth is between the moon and the sun
the moon does not lie on the line joining the sun and the earth
the moon is between the sun and the earth
the sun is between the moon and the earth

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Physics
A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

B will reach the ground first.
The question is incomplete because the masses of the spheres are not given.
A will reach the ground first.
Both the spheres will reach the ground simultaneously.

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Physics
Skating on ice is possible because

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

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