[" 17.An electron and a proton are detected in a cosmic ray experiment the first with kinetic "],[" energy "5KeV" and the second with "50KeV" which is faster,the electron or the proton? "],[" Obtain the ratio of their speed.Given that electron mass "=9.11^(*)10^(-33)Kg" and proton "],[mass=1.67^(*)10^(-27)Kg.1eV=1.6^(*)10^(-19)J]