65. Using m
p
= 1.672623
× 10
−27
kg in Eq. 38-45 yields
γ =
E
m
c
2
=
14.242
−9
J
1.50328
−10
= 94.740 .
Solving for the speed , we obtain
v = c
1
−
γ
= 0.99994c .