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In the MKS system of units, the proportionality constant in Coulomb's law is 1/( 4 pi �µ0 )
' �µ0 ' is the electrostatic permittivity of free space.
It does seem unnecessarily complicated. But there are reasons for it, and it all works out.
Answer2:
The constant used in Coulomb's law is one of the most important constants in Physics. It is related to Planck,s Constant, h. The permittivity e0= 1/zc where c is the speed of light and z is the free space impedance, z= w/q ; w is the quantum magnetic charge in webers ,volt-second and q is the quantum electric charge q. Planck's Constant h= qw = 2/3 E-33 and z = 375 ohms.= w/q
The q= 4/3 E-18 Coulomb and w = 500 E-18 volt second.
The quantum electric charge q=4/3 E-18 C x 6.25E18e/C= 25/3 e = (13U1d) in Quarks., U=Up and d=down.
The electron is an rms charge F= -e^2/4pi e0 r^2 = - e^2zc/22pir^2=e^2hc/2q^22pir^2= -alpha ch/2pir^2.
The Fine Structure Constant alpha = 0 .5 (e/q)^2 = .5( .16/4/3) = .5 (.12)^2 = .5 (.0144) = 7.2E-3
F = -ach/2pi r^2 = -vp/r where v=ac = 7.2E-3 300Mm/s = 2.16Mm/s.
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What are the units of the Coulomb constant k which appears in Coulomb's law?
newtons * meters squared / coulombs squared
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What is the value for Coulombs constant k?
8.998 X 10^9 N*m^2/C^2
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In Charles' Law, the mass is held constant which means that the pressure on the gas is constant.
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The unit of the constant of proportionality in Coulomb's law is Nm²/C² or Vm.
What are the limitations coulombs law?
Limitations of coulombs law
What are the units of the Coulomb constant k which appears in Coulomb's law?
newtons * meters squared / coulombs squared
Is coulombs law a universal law?
No
What is Avogardo's constant used for?
Well it is used in certain Chemical equations and to derive other constants. As an example the charge on an electron = 1.6019 x 10-19 coulombs. So a mole of electrons will be 6.023 x 1023 (Avagadro) x 1.6019 x 10-19 coulombs per mole = 96495 coulombs per mole which is Faraday's constant
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Newtons law has to due with mass and ATTRACTION only Coulombs law has to due with charge and ATTRACTION AND REPULSION
What is coulombs constant?
It is 8.9875517873681764×109 N·m^2/C^2
How do you calculate electrostatic force?
coulombs law
Faraday law of elecrolysis?
W = (I*t*A)/(n*F)where:W = weight of plated metal in grams.I = current in coulombs per second.t = time in seconds.A = atomic weight of the metal in grams per mole.n = valence of the dissolved metal in solution in equivalents per mole.F = Faraday's constant in coulombs per equivalent. F = 96,485.309 coulombs/equivalent.
What mathematical expression identifies the number of coulombs necessary to produce one mole of iron metal from an aqueous solution of iron III sulfate?
The mathematical expression is Q = nF, where Q is the total charge in coulombs, n is the number of moles of electrons transferred (in this case, 3 moles for iron III sulfate to iron metal), and F is the Faraday constant (96,485 C/mol). Therefore, the number of coulombs necessary would be Q = 3 * 96485 C/mol = 289,455 C.
What does the proportionality constant k in coulombs law is huge in ordinary units whereas the proportionality constant g in newtons law of gravition is tiny mean?
It means that the force of electrical attraction (or repulsion) between two particles with units charges will be greater than the gravitational attraction between two particles with unit mass which are the same distance apart.
Does coulombs law predict the attraction between two unlike charges?
yes
