Physics
A body absorbs heat most if it is

White and rough
White and smooth
Black and rough
Black and smooth

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

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Physics
For an ideal gas, which one of the following statements does not hold true?

The kinetic energies of all gas molecules are not same
The potential energy of the gas molecules is zero
The speed of all gas molecules is same
There is no interactive force between the molecules.

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Physics
Which is evidence that supports the dynamo theory?

Convection occurs in Earth's inner core
Granite and basalt conduct electricity
Earth's core contains a large amount of iron
Earth's outer core contains liquid that conducts electricity

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