Q refers to charges. Charges are measured in coulombs.
The variable for charge in coulombs is typically represented by the letter "Q".
q is just a variable name. It represents different things in different equations around the world.
In physics, the fundamental units of charge (q) are measured in coulombs (C).
1 Ampere = 1 Coulomb per second0.25 A = 0.25 Coulomb per sec1 minute = 60 seconds20 minutes = (20 x 60) = 1,200 seconds0.25 A for 20 minutes = (0.25 x 1,200) = 300 Amp-seconds = 300 Coulombs of charge
The unit of the constant of proportionality in Coulomb's law is Nm²/C² or Vm.
Limitations of coulombs law
The variable for charge in coulombs is typically represented by the letter "Q".
No
q is just a variable name. It represents different things in different equations around the world.
Newtons law has to due with mass and ATTRACTION only Coulombs law has to due with charge and ATTRACTION AND REPULSION
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.
In physics, the fundamental units of charge (q) are measured in coulombs (C).
coulombs law
The main use of a Faraday is in the formula Q=nF. If this is rearranged, F=Q/n A Faraday is 96485 coulombs.
For a steady flow of charge through a surface, the current I in amperes can be calculated with the following equation:I = Q/t where Q is the electric charge transferred through the surface over some time t. If Q and t are measured in coulombs and seconds respectively, I is in amperes. Thus: I = 0.24 coulombs / 15 msec I = 0.24 coulombs / 15 * 10^-3 sec I = 16 amps
To calculate the amperes when given coulombs, use the formula: Current (I) = Charge (Q) / Time (t). If the time is not specified, you can't determine the current from just the charge in coulombs.
1 Ampere = 1 Coulomb per second0.25 A = 0.25 Coulomb per sec1 minute = 60 seconds20 minutes = (20 x 60) = 1,200 seconds0.25 A for 20 minutes = (0.25 x 1,200) = 300 Amp-seconds = 300 Coulombs of charge