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The law of conservation of energy, which states that the amount of energy in a system is constant. For questions about Earth's environment, see the climate-science tag instead.
3
votes
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Motional EMF and Conservation of energy
Consider a conducting rod moving in a uniform magnetic field $\vec{B}$ with a uniform velocity $\vec{v}$. According to the theory involved, the electrons experience the magnetic force ($-e\cdot\vec{v} …
2
votes
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answer
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Calculating coefficient of friction
Consider a body attached to a horizontal spring and resting on a surface, inclined at an angle $\theta$ from the ground.
The spring constant is $k$. Initially the spring was kept in its natura …