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This is Giancoli Answers with Mr. Dychko. Presumably the force the proton will experience at this point in space is only going to be due to the electrostatic force in which case electrostatic force will equal the net force. So the net force is mass times acceleration and we're told that it experiences an acceleration of 2.4 million g. So that's 2.4 times ten to the six times g. And then we can say electric field is that net force divided by the charge. So it's 2.4 times ten to the six mg divided by q. So 2.4 times ten to the six times 1.67 times ten to the minus 27 kilogram, mass of a proton, times 9.8 newtons per kilogram divided by 1.602 times ten to the minus 19 coulombs charge on a proton and we get 0.25 newtons per coulombs must be the strength of the electric field.