- #1
1101
- 23
- 0
Okay so I'm working on a question for practice and I'm sure I'm getting the right answer but the answer they give me is something different. Anyway the exact question is:
An electron is located at the origin of the coordinates, and a second electron is brought to a position 2 Angstroms from the origin. Calculate the force between the two electrons.
I'm guessing I need to use the equation:
F(r) = (q1*q2)/(4*(pi)*e*r2)
Where q1 and q2 are the magnitude of the charge of the electrons, which I'm taking to be e2 or (1.602E-19)2
Where pi is pi, ie 3.14159....etc
Where e is the vacuum permittivity constant, 8.854E-12
Where r is the distance between the two electrons in meters which I'm taking to be 2E-10 since 1 angstrom is 10-10 meters
Anyways I do the calculations and I'm getting 5.7666E-9 Newtons but in the back of the problem book it says the answer is 7.1999E-9 Newtons
It's close but I'm wondering if there's some trick to the problem or something I missed. Can someone confirm or dispute if I'm doing this correctly?
An electron is located at the origin of the coordinates, and a second electron is brought to a position 2 Angstroms from the origin. Calculate the force between the two electrons.
I'm guessing I need to use the equation:
F(r) = (q1*q2)/(4*(pi)*e*r2)
Where q1 and q2 are the magnitude of the charge of the electrons, which I'm taking to be e2 or (1.602E-19)2
Where pi is pi, ie 3.14159....etc
Where e is the vacuum permittivity constant, 8.854E-12
Where r is the distance between the two electrons in meters which I'm taking to be 2E-10 since 1 angstrom is 10-10 meters
Anyways I do the calculations and I'm getting 5.7666E-9 Newtons but in the back of the problem book it says the answer is 7.1999E-9 Newtons
It's close but I'm wondering if there's some trick to the problem or something I missed. Can someone confirm or dispute if I'm doing this correctly?
