Physics
Kepler's law of planetary motion states that the square of the time period is proportional to the

Semi-major axis
Fourth power of the semi-major axis
Square of the semi-major axis
Cube of the semi-major axis

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Physics
Which of the following events occurred first ?

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

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