Recent content by ceity

Homework Statement Find the net charge of a system consisting of 2.0×10^7 electrons. Homework Equations e = 1.60 * 10^-19 C The Attempt at a Solution (1.60 * 10^-19) * (2.0×10^7) = 3.2 * 10^-10 ...but I got it incorrect. I'm confused as to how else I'm supposed to solve this.

Homework Statement #1: The graph of f' is shown. Find the intervals on which f increases. #2: The graph of f'(x) is shown. Give the interval(s) where the graph in concave down. Homework Equations Not sure. The Attempt at a Solution #1: Well, I thought it was (-infinity...