10)
IN the magetic field
Fc = Fb
mv^2/r = qvB
r = mv/qB
timeperiod T = 2pir/v = 2pim/qB
frequency f = 1/T = qB/(2*pi*m) =
f = (1.6*10^-19*90*10^-3)/(2*pi*1.67*10^-27)
f = 1.37 MHz <<<<<<<---------answer
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kinetic energy
K = 0.5*m*v^2
r = mv/qB
v = rqB/m
k = 0.5*r^2*q^2*B^2/m
k = 0.5*1.26^2*(1.6*10^-19)^2*0.9^2/(1.67*10^-27)
k = 9.86*10^-12 J
k = 9.86*10^-12/(1.6*10^-19)
k = 61.6 MeV
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