|MadSci Network: Physics|
BACKGROUND My problem involves physical constants where : h = Plancks constant c = speed of light m = mass of an electron e = electrostatic charge a =fine structure constant p = pi and r =2.817 X 10^-15 metres and is the dimension (in metres) formerly associated with the radius of an electron, but can otherwise be thought of as the orbital radius of an electron were it able to travel at the speed of light around a proton. OBSERVATION It can be written that : (e^2 x 10^-7) = (r m) = ha/2face=Symbol>pc (kg m) Please note that the dimension of kg m (kilograms multiplied by metres) appears to be equivalent to e^2 X 10^-7 (coulombs squared multiplied by a dimensionless number). Also note that it becomes possible to describe for example electron mass in terms of coulombs^2 per metre. QUESTIONS - the dimensionless number 10^-7 crops up time and again in electrostatic equations. Why? What is its significance? and, - are coulombs (the unit of electrostatic charge) interchangeable with the dimension of the kilogram metre (which also seems to be a unit of electrostatic charge)?
Re: VRD - coulombs, physical constants
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