What is the recoil speed of the goldnucleus

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A proton is shot at 5.0x10^7 m/s toward a gold target. Thenucleus of a gold atom, with a mass 197 times that of the proton,repels the proton and deflects it straight back with 90% of itsinitial speed. What is the recoil speed of the goldnucleus?

Reference no: EM13654630

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