Physics
The recoiling of gun is an example of which of the following?

Law of Conservation of Linear Momentum
Conversion of Kinetic Energy to Potential Energy
Law of Conservation of Energy
Law of Conservation of Angular Momentum

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Physics
Planets are

luminous heavenly bodies revolving around a star
luminous heavenly bodies that twinkle
non-luminous heavenly bodies
luminous heavenly bodies that do not twinkle

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

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