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

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

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Physics
Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)

The silver piece will weigh more
The gold piece will weigh more
Both silver and gold pieces weigh equal
Weighing will depend on their masses

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