Energy and Power

[MDwannabe7]

An electron and a positron are held in a storage ring, and they each lose 260 MeV of energy per revolution in the form of electromagnetic radiation. If the frequency of revolution is 10,000 HZ, how much power must be supplied to keep the total energy constant at 180 GeV?

Help?

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[HawkeyePostOp]

not sure about this

1 MeV/s is about 1.6E-13 watts

2 particles so you lose 520 MeV 10,000 times a second, or 5.2E6 MeV/S. So that's 8.32E-7 watts?

 

[MDwannabe7]

That is the right answer - I think I was thrown off by the keeping it constant at 180 GeV instead of just realizing that you need enough power to counteract what you are losing - duh! Thanks for your help.