Two protons are 2.1 fm apart. Part A What is the magnitude of the electric force
ID: 1588512 • Letter: T
Question
Two protons are 2.1 fm apart.
Part A
What is the magnitude of the electric force on one proton due to the other proton?
Express your answer to two significant figures and include the appropriate units.
Part B
What is the magnitude of the gravitational force on one proton due to the other proton?
Express your answer to two significant figures and include the appropriate units.
Part C
What is the ratio of the electric force to the gravitational force?
Express your answer using two significant figures.
Explanation / Answer
charge of proton, q = 1.6*10^-19 m
mass of proton, m = 1.67*10^-27 kg
d = 2.1 fm
= 2.1*10^-15 m
A) Fe = k*q^2/d^2
= 9*10^9*(1.6*10^-19)^2/(2.1*10^-15)^2
= 52 N
B) Fg = G*m^2/d^2
= 6.67*10^-11*(1.67*10^-27)^2/(2.1*10^-15)^2
= 4.2*10^-35 N
C) Fe/Fg = 52/(4.2*10^-35)
= 1.2*10^36
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