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You are missing the potential energy.


That adds roughly (6.674e-11(m^3)(kg^-1)(s^-2) * 5.972e24kg * 0.004kg) / (6380km + 420km) = 234kJ. So 355kJ total. That's 5.9kW over 1 minute, or 590W over 10 minutes, etc. It's 10^5W over 3.55s, not several minutes. So either the power is incorrect or the time is incorrect.




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