An electron and a proton are …
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An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy 10KeV, and the second with 100KeV. Which is faster, the electron or the proton? Obtain the ratio of their speeds (electron mass =9.11∗10−31kg, Proton mass =1.67∗10−27kg, 1eV=1.60∗10−19J).
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