Prob: Determine the force between two electrons spaced 0.1 nm apart.
Concepts to be used
Coulomb's formula for the electric force between two charges.
(1) F = k*q1*q2/r²
q1,q2 charges
r = separation between charges
k = constant
In SI units k is measured to be 8.98755*10^9 N-m²/C²
The constant k is often written as 1/4πε0.
The constant ε0 is called the permittivity of the space and its value is
ε0 = 8.85419*10^-12 C²/N-m²
q1 = q2 = -1.6*10^-19 C
r = 10^-10 m
F = [9*10^9(1.6*10^-19)²]/(10^-10)²
= 9*2.56(10^(9-38+20))
= 23.04(10^-9)
= 2.304*10^-8
No comments:
Post a Comment