Question Detail

If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this ?

Newton first law
Newton second law
Newton third law
Principle of conservation of linear momentum

Answer: Option D

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Cathode rays are invisible and travel in a straight line.
These rays can ionise gases.
These rays can penetrate through thin metal foils.
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Answer: Option D

Explanation:

These rays heat the materials on which they fall.

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Answer: Option A

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Answer: Option C

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Answer: Option A

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