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OpenStudy (anonymous):
PLEASE HELP, HAVE AN EXAM IN A FEW DAYS!! Should be very simple: surface polarisation charge density = P dot n How can this be a surface charge density? Surely is has units [C/m^2] x [m] = [C/m]?
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OpenStudy (anonymous):
unit vectors are dimensionless.
OpenStudy (anonymous):
Thanks, wasn't thinking straight. The context confused me for a bit.
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