Recent content by James2288

  1. J

    Can someone explain the negative sign in the capacitance formula?

    Thank you ... Can I say when the electric force is exerted in the same direction to the displacement that make a positive work ??
  2. J

    Can someone explain the negative sign in the capacitance formula?

    Hi everyone, 1. Homework Statement It takes 18 J of energy to move a 0.30-mC charge from one plate of a capacitor to the other. How much charge is on each plate? Homework Equations -We/q = ΔV C = Q/V The Attempt at a Solution -18J/0.3.10-3 C * 15.10-6 F = Q Q = -0.9 C The problem is...
  3. J

    Exploring Physics and Math: A Microbiologist's Journey Back to University

    Hi everyone,I'm 31 guy from France after worked about 10 years in a microbiology lab I decided to go back to university. So I'm trying to review my physics courses and also math chemistry etc. I learn by myself so I think it's a good idea to suscribe in a forum because sometimes it's difficult...
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