Why did Coulomb use the letter "q" to represent the charge of an object?
412217
it's the last letter of his name rotated 180 degrees.
884873
didn't understand the q
247677
There's this equation called Coulomb's Law that relates charge and force: F=k*Q*Q/(r^2), where k is Coulomb's constant (8.988e9) and r is the distance between the two charges. That doesn't give us the units for an electric field, which is a force per charge. But we can divide both sides of Coulomb's Law by a Q, giving us F/q=k*Q/(r^2).\n\nTo find the magnitude and direction of the net electric field, you need to add together the electric field vectors created by each of the two charges. For the first charge, the electric field is k*15e-6/(.12^2)=9.36e6 N/C. The electric field of the second charge is k*10e-6/(.05^2)=3.60e7 N/C. Make sure to change cm to meters, and note that the charge q at which you are finding the electric field does not factor into our equation. Hopefully the problem describes in more detail the location of the two charges so you can determine the appropriate vector sum's magnitude and direction.
899876
No special reason. All letters have been used in physics.\nRather arbitrary chosen.\n\nTh
53027
It comes from the combination of "electric" and "-on," such as in anion, cation, and ion. It is electric, because it is the carrier of electric current through solid bodies.
1148010
You have to understand that the coulomb was valued before the idea of an electron existed (1700's versus 1900's). Electrical circuitry was around long before anyone guessed that electrons were there. A coulomb was just the amount of charge that flowed through a wire in 1 second at 1 amp. It's an arbitrarily selected constant, but consistent with the other selected constants of that time period. It's also an easy size to work with for macroscopic calculations, and is directly tied to Joules, Watts, Ohms, and so on. We CAN use the electron as a "positive charge", but it was selected (arbitrarily, again) as negative early on. The mole is, of course, along the same lines; it fit with their units at the time and was based on other preexisting units.
912269
Calling the electron charge negative and the proton charge positive is an arbitrary choice.  Ben Franklin is generally credited with first making that choice for us.\n\nWhy do electrons have charge?  Why do charges experience the forces they experience?  Because that's how God created the universe and its physical laws.  It's fundamental to atomic structure.  If charge didn't exist, or if the forces behaved differently, we wouldn't have the universe as we know it.
1133293
Because this convention was defined before the electron was discovered. Benjamin Franklin was experimenting with static electricity in the mid 1700's and decided that the charge on a glass rod was "positive". \n\nIn the late 1800's experimenters were able to make electricity flow in a vacuum (cathode rays) and discovered that the current was carried by negatively charged particles, which were eventually named "electrons".
111480
it appears to be the name of the CO-2 ion. (-2 is the charge).
120118
Charged object \n\nIt means that the object contains unbalanced positive and negative charge .\n\na nutral object would have equal amount of positive and negative charge and a charged one would have unbalanced one .\n\nexample : if an object have 3 electrons ( carrier of negative charge ) and 1 proton ( carrier of positive charge ) then  the object would be said as a negatively charged object .\n\nPS every object is made of atoms and an atom is made of proton and nutron at the centre with electrons spinning around them . \n\nand normally an atom has equal number of proton and electrons ... \n\nbut if some how some one add more electron or take some of the electrons from the atom then that atom would have a unbalanced charged situation . \n\nif you make object of that kind of unbalanced atoms then you would have a charged object .\n\nproviding that the atoms are not neutalizing the charge effect of each other ..\n\nhope it works take care
129468
It's a negative or positive charge that is used to repel oppisite forces
944873
Charge is difficult to explain without just saying how it interacts with other charge...\nBasically its a fundamental property of matter, like mass. The difference is, since charge comes in two types, positive and negative, in most large collections of matter, they cancel out and things are generally electrically neutral (have no charge). It responds to other charges through electromagnetism, much like masses affect each other through gravity, and is affected by electromagnetic fields created by currents, and magnetic fields also.\n\nCharge sits on a fundamental particle, or atom, or molecule, or larger particle. If that particle is in a collection of other particles, all of which are moving in the same direction, you have a current - a flow of charge. An ampére (or amp) is a unit meaning "one coloumb per second", or that at a point in a circuit where 1 amp is flowing, one coulomb of (positive) charge is passing per second. The coulomb is actually defined in terms of the ampere - it is the amount of charge that flows past a point in one second when the current is one amp.\n\nIn the example you've given, 240 C passes a point every five minutes, or every 300 seconds. So every second, (240/300) C/sec flows. This is the same as saying that 0.8 (=240/300) amps is "flowing" at that point. The matter is complicated by saying that current flows - it doesn't really, its a property of a stationary point in a circuit. The charge flows. If the rate of charge flow changes, so will the current, but saying that the current flows is a bit of a misnomer. But we're stuck with it.\n\nHope this helps.
249869
one electron is 1.60217646 × 10-19 C\n\n1 coulomb is 6.242197253 * 10 ^ 18 electrons
766145
It depends on how far away from the noble gases they are. Like anything in gourp IA would be 1+, IIA 2+ etc, then when theyre closer to the right then its like VIIA 1-, VIA 2-\n\nTransition metals are different because they form multiple ions. It would indicate what the charge is.
99566
p=q*d\nq=1.60*10^-19 coulombs\nd=4.30*10^-3 m\nso\np = q*d = 1.60*10^-19 * 4.30*10^-3 = 6.89*10^-22 coulomb*meters
430634
Electric charge is a characteristic of subatomic particles, and is quantized. When expressed as a multiple of the so-called elementary charge e, electrons have a charge of −1. Protons have the opposite charge of +1. Quarks have a fractional charge of −1/3 or +2/3. The antiparticle equivalents of these have the opposite charge. There are other charged particles.\n\nThe electric charge of a macroscopic object is the sum of the electric charges of its constituent particles. Often, the net electric charge is zero, since naturally the number of electrons in every atom is equal to the number of the protons, so their charges cancel out. Situations in which the net charge is non-zero are often referred to as static electricity. Furthermore, even when the net charge is zero, it can be distributed non-uniformly (e.g., due to an external electric field), and then the material is said to be polarized, and the charge related to the polarization is known as bound charge (while the excess charge brought from outside is called free charge). \n\nAn ordered motion of charged particles in a particular direction (typically these are the electrons) is known as electric current.
322867
The reason for that is simple.\nAll fundamental forces work on objects carrying a specific type of charge, as in electrical charge, weak charge, colour charge....\nThe charge for gravity is mass. And unlike other of these charges it has only one type (maybe predominantly) - positive mass. For that reason, there is no chance for masses to cancel each other out like when you have a positive charge and a negative charge and together the objest (an atom, for instance) is neutral electrically\nI'm not sure about the weak charge though. Weak forces have a limited range because the bosons that carry them are heavy and can't go far, because of uncertainty (I'm not going into this deeper)\nBottom line: gravity works long range because all masses add up and not cancel each other out.