Homework SourseThis question is giving me a life time situations Please hel
This question is giving me a life time situations! Please help!! The answer in the book says
a) 10^-16,10^-12,10^-9,10^-2,0.65
b) about 0.1c
No idea how they got these answers please show me the work!
Solution
the kientic energy of the electron is,
k = (1/2)mv^2
= (1/2)m(c/n)^2
= (1/2)(9.11x10-31)(3x10^8/1.000277)^2
= 4.097e-14 J
= 256076.8 eV
= 0.256 MeV
(B)
Current, i = q/t
t = q/i = 1.6x10^-19 / 16x10^-3 = 1.e-17 s
acceleration of the electrons is,
a = v/t = (c/n) /t = (3x10^8/1.000277) / 1.e-17 = 2.999e+25 m/s^2
hence, the force is,
F = ma = 9.11x10^-31 * 2.999e+25 = 2.73e-5 N
