Jupiter rotates fastest, day ~9.9 hours. Mercury's day is long. This is general knowledge but physics related. If out of syllabus, I can skip. But syllabus doesn't mention planets. I'll stay within syllabus. Better to replace with a scientist question. Replace with: Who invented the electric bulb? Edison. I'll change to: The electric bulb was invented by Thomas Edison. So new question:
Explanation:
Lenz's law is a consequence of the conservation of energy. It dictates that an induced electromotive force (EMF) always gives rise to a current whose magnetic field opposes the change in original magnetic flux that produced it. If a north pole approaches a coil, the coil face becomes a north pole to repel the magnet, requiring work to overcome.
Explanation:
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.
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