Physics
If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated?

Depends upon the metal
Increases
Unchanged
Decreases

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Physics
Which of the following events occurred first ?

Albert Einstein propounded the General Theory of Relativity
Madame Marie Curie became the first woman Nobel Prize winner
Marconi first tranmitted a wireless signal
Max Planck unveiled the Quantum Theory

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Physics
The sensation of weightlessness in a spacecraft in an orbit is due to the

Presence of gravity outside but not inside the spacecraft
Acceleration in the orbit which is equal to the acceleration due to gravity outside
Absence of gravity outside
Fact that spacecraft in the orbit has no energy

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