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The rest mass of a proton is 1.673x10-2kg & that of the electron is 9.109x10-kg. What must be the speed of the proton which has the same be Broglie wavelength as an electron moving with a speed of 9x10m/s (A) 3600m/s (B) 4900 m/s (C) 4300 m/s (D) 5600 m/s

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