Find extension if elastic potential energy is same
A spring with constant k = 800 N/m is compressed 12 cm from its equilibrium position. A spring with spring constant k = 400 N/m has the same elastic potential energy as the first spring when it extension is?
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How large an emf (rms) will be generated in an antenna that consists of a 426 loop circular coil of wire 1.54 cm in diameter if the EM wave has a frequency of 886 kHz and is transporting energy at an average rate of 1.17E-4 W/m2 at the antenna?
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