Recent content by Dr L

H•m−1 A2•s-2•kg•m T•m•A-1 N•A2 V•s•A-1•m-1 Wb•A-1•m-1 I got these from Wiki but want to know if they are correct

I got the following for the units of Vacuum permeability: H•m−1 A2•s-2•kg•m T•m•A-1 N•A−2 V•s•A-1•m-1 Wb•A-1•m-1 Does anyone see anything wrong with these units? Are the SI base units correct? A2·s4·kg−1·m−3 in SI base units Should it be (Amps)-2 power?

Thank you vorhees71! That is an incredible reply to my question. I owe you a beer! Thanks!

Coulomb's Law states F = q**2/ r**2 q= statCoulombs In SI units, F = Ke (q**2/r**2) q= Coulombs I read that 1 C = 2.997 x 10E+09 statC Then Ke = 8.987 x 10E+09 (1) Does anyone know where the conversion for C to statC came from? (2) and how you get the Ke from those values...

Do you know why there are there are 3.0 x 10E+09 statC in 1 Coulomb. And the speed of light is 3.0 x 10E+08 m/s ? It can't be a coincidence can it?

Is that because Coulomb's Law is the perfect example of the relation between Magnetic Field and Electric field?

Great reply by vanhees71. Thanks for taking the time.

So, you are saying that Coulomb put an amount of charge on the two balls in the torsion balance, and then calculated the force due to the twist in the thread when the balls repelled each other. That force he calculated was equal to the charge divided by the distance squared. So Coulomb did not...

Actually, Coulomb found by experiment that the force is proportional to charge and distance, but he did not know there was a constant Ke. Does anyone know who (and when) came up with the idea for Ke?

Coulomb's law says that the electrostatic force between two electric charges is given by the formula: Ke*q1*q2/r^2 Who was the first person (and when) to determine Ke? How did they figure it out? Who named it Coulomb's Constant?