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An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy 10 keV, and the second with 100 keV. Which is faster, the electron or the proton ? Obtain the ratio of their speeds.
(Electron mass `=9.11xx10^(-31) kg`, proton mass `=1.67xx10^(-27) kg, 1 eV=1.60xx10^(-19) J)`.

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