A rocket works on the principle of conservation of
A. Energy
B. Momentum
C. Mass
D. Angular momentum
Answer: Option B
Solution (By JKExamLibrary)
Rocket propulsion: expelled gases backwards impart forward momentum to rocket. Total momentum of rocket + exhaust gases remains conserved. No external force, so momentum conservation applies. Jet engines also work on similar principle.
Explanation:
Heat travels through spoon from hot end to cold end by conduction (molecular vibration and free electrons). Handle gets hot. Metal good conductor.
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