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An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 10-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 5.4 10-11 m, what are the magnitude and direction of the electrostatic force exerted...

A uniform electric field is directed upward and has a magnitude of 5 N/C. What are the magnitude and direction of the force on a charge of -3 C placed in this field? F=Eq E=5 q=-3 5(-3)=-15N Downward Ok I have the downward correct the -15 is incorrect. Di...

F=k*q1*q2/r^2 k= 8.99^9 q1= 1.6^-19 q2= -1.6^-19 r^2= 5.4^-11 am i even close?

the ^ should be e sorry...

So is -7.89e-8 my answer? Sorry I only have one more time to put it in my homework and I want to make sure I got it right this time!

I'm sure... I copy/paste this question on here to be sure I got it right.