Homework Help: Physics

Posted by Melissa on Sunday, September 26, 2010 at 6:40pm.

Two very small spheres are initially neutral and separated by a distance of 0.50 m. Suppose that 2.50 x 10^13 electrons are removed from one sphere and placed on the other. What is the magnitude of the electrostatic force that acts on each sphere?

Physics - bobpursley, Sunday, September 26, 2010 at 7:19pm
F=kQ1Q2/.50^2

for Q1, Q2 the amount of charge in coulomb is 2.50E12*1.6E-19coul/elelctron
Physics - Melissa, Sunday, September 26, 2010 at 7:25pm
So in solving the answer it would be F=(8.99E9)*(2.5E13*1.6E-19)*(2.5E13*1.6E-19)/.50^2? If so, I dont think I did it right. I ended up with an answer of .57536
Physics - Nicole, Monday, October 17, 2011 at 11:08pm
Isnt one of the values you multiplied the 2.5E13 by has to be negative? For an electron, its -1.602 x 10^-19, while for a proton its 1.602 x 10^-19. Is this by any chance IB Physics?

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