# Dipole moment of electrically neutral system of charges.

The answer is desired in m C. Is that millicoulombs?

Note by John Chang
5 years ago

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I blindly accepted your answer and got it wrong, of course. I realized afterwards that the dimensions must be coulomb-meters (which is how I would state it -- somehow meter-coulombs (m C) sounds funny to me).

- 5 years ago

Yes, the answer is desired in millicoulombs.

Staff - 5 years ago

Hang on... First, the question explicitly hasa dot between m & C on the cahllenge page, suggesting a multiplication. Also, the SI units of an Electric Dipole Moment is, according to the page on wikipedia that you have referred to, the coulomb-meter (http://en.wikipedia.org/wiki/Electricdipolemoment). This also seems to be dimensionally correct, based on the equation stated in the challenge. What have I missed?

- 5 years ago

You have missed nothing.

I was sorely mistaken, and the correct unit is in fact the coulomb-meter.

Staff - 5 years ago