a) What is the energy in J corresponding to 10eV?
b) What is the speed of an electron with a kinetic energy of 500eV?
The charge and mass of an electron are 1.6x10^-19C and 9.1x10^-31kg respectively
electric potential
2011-09-18 7:08 am
回答 (1)
2011-09-18 7:28 am
✔ 最佳答案
a.By E = qV,
10eV
= 10 * 1.6*10^(-19)
= 1.6 * 10^(-18) J
b.
mv^2 /2 = 500(1.6*10^(-19))
9.1 *10^-3 * v^2 /2 = 500(1.6*10^(-19))
v = 1.33 * 10^(-7) m/s
參考: Hope the solution can help you^^”
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