why we show charge by q?
436857
Good question. \n\nIt's just notation. Just like why do we show potential energy by U? Why do we show density by "rho"?
921926
mg + ion\no -ion\nk +ion\ns -ion\nwhen they are 'added' together (MgO and K^2S) the charges are balanced, that means that the net charge is 0.
460256
BE CLEAR WHILE ASKING..\nWE CANT UNDERSTAND YOUR 'Q'.
57062
When u apply potential difference to 2 ends of conductors this free electrons being negatively charged get attracted towards + potential. This results inflow of current.
810779
Let the two +Q charges be placed left to right with the distance r separating them.  Let a third charge of unknown charge q be placed a distance x to the right of the first charge.  Now, look at each of the +Q charges and sum the electric force acting on them.  For example, the left hand +Q charge experiences a repellent force from the +Q on the right, pushing it towards the left.  To balance this out, there must be an attractive force pulling it to the right, so the q charge is negative.  However, this is just an observation.  In order to maintain the integrity of the algebra, we should continue to assume that q is positive, but recall the negative result llater when we check our answer..  The proportionality factor for electric field strength can be ignored, because it will cancel out, so you can treat Q/r^2 as the value under consideration.  In this case, we need Q/r^2 + q/x^2 = 0.  However, because the +Q charges are equal in magnitude, I will make the assumption that the distance x = r/2, so Q/r^2 = -4q/r^2 ==> Q = -4q ==> q = -Q/4.  Perform the same force balance on the right hand +Q charge to verify.\n\nIf the initial charges had been unequal, x would have remained a variable, and the complementary distance (r - x) would have been used for the second force balance in order to form a system of equations.
854263
The mass of the electron has been measured to an accuracy of 0.17 parts per million.  That's consistent with all electrons having the same mass, but not enough to rule out the possibility of more than one mass value where all are within the accuracy limits of our measurements.  The proton mass is known to the same accuracy.\n\nThe charge of the electron has been measured to 85 parts per billion.  No measurement has found a difference in magnitude between the electron and proton charge.\n\nTo answer the question, I would try to think of experiments whose outcome would be different if the mass or charge differed.  I would also run lots of simulations with varying assumptions for those values.  Quantum effects make it extremely difficult to measure the results of such experiments.
744501
C = Q/V = εA/d\n\nwhere ε is the permittivity of free space or air\n= 8.8541878176 × 10−^12 F/m (C2/Jm)\n\nQ = (εAV)/d = [(8.85×10^−12)(0.4)(200)]/(0.0005)\n= 1.416 x 10^-6 Coulomb\n\nis the charge on the upper plate.\n\nThe charge on the lower plate that is grounded is ZERO, because the charges have moved down into the ground.
884873
didn't understand the q
758851
This is because the nuclear attraction over the electrons increases.\nRemember Coulombs law of electro_nuclear forces.
981010
this works well, cation has a letter t in it, and t looks like +, so it is positive!  i never forgot this since like 10 years ago\nn_n
229031
Electric current is given as the charge flowing through a given section per unit time.\n\nThe SI unit of charge is the Coulomb.  The SI unit of time is the second.  Therefore, the SI unit for current is the Coulomb per second (AKA, the amp).\n\n1 Amp = 1 Coulomb / second\nSo in 1 second, 1 Coulomb of charge has flowed past a given section of wire at 1 amp.\n\nOne electron has a charge of 1.6021765314 ×10-19 Coulombs.\nIf in 1 second, 1 Coulomb of charge is flowing through a section of wire, then there must be about 6.241 E18 electrons flowing past that section.
526886
In order:\n\n1) Red, blue, and green colour charges are distinct, but arbitrary, exactly like + and - electrical charges.  There is a difference between something positively charged and something negatively charged.  With quarks, it's simply that there are three different kinds of charge, instead of just two for electromagnetism.\n2) Because gluons are, themselves, influenced by the strong force, a correct description of the quantum force diagrams (penguin diagrams, if you know that term) must necessarily include higher order interactions than simply quark <-> gluon <-> quark.  The one you propose is, I believe, possible by the rules governing the quantum behaviour of quarks and gluons, as are many, many more distinct diagrams.\n3) There is no meaningful order.  RBG and RGB are both "colourless".\n4) String theory is outside of my area of expertise, I don't think I can address this issue in any meaningful way.
892428
To provide a simple answer that does not involve a lot of mathematics, differential equations are used in almost every scientific field to provide a mathematical description of a process.  They are useful because most processes can be described in terms of changes that result from small differences in elements of the process.  When these small changes are represented in mathematical form the result is a differential equation.  Because the changes are small, it is possible to make assumptions that simplify the expression of the process.\n\nFor example, consider the discharge of a capacitor into a resistor.  We know that the charge stored in the capacitor is Q = V*C, where V=voltage on the capacitor, and C is the capacitance.  A small change in charge, dQ will cause a small change in voltage, dV.  The voltage across the resitor will be V, and the current in the resitor V/R.  The current is the amount of charge divided by the time, or change in current is change in charge divided by change in time, or dI = dQ/dt.  (Note: here is the simplifying assumption:) For very small changes in Q, we can assume that the voltage does not change, so that the current is constant in that interval.  Therefore dV=(1/C)dQ = idt = (V/C*R)dt; rewriting this as a differential equation gives\n\ndV/dt = V/(C*R),\n\nwhich describes the discharge of a capacitor into a resistor.  This is a particularly simple example, and differential equations of more complex processes can get very messy, and many cannot be solved explicitly.
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.
389562
Well that book must have a misprint or something because q=CV is not accurate. Actually if the potential of a outside conductor depends on the size, then this is a variable dependent, (and therefore mutable) in structure, shape, and amount of conduction based on the charge of q. For if C=q/v, then the isolated conductor's potential to change will be hinder and therefore not fully capable of allowing a full transformation for V due to the charge (power) of q.
15546
Interesting scenario first of all i would like to comment. Well actually the bond is due to electronic forces. Hence mass has litle effect on the bond strength. Thus i thikn the effect of mass change should be a small one!! unless you change the charge of proton too!!
542625
It's either just one charge: The electrical, which appears in positive and negative characteristics, or if you see "charge" in a more general way it's more then one charge: magnetism has also a source, but that appears always in dipoles, mass is the "charge" of gravity, but that appears just with a positive sign, and the strong interaction has three kind of charges, called "colour charges": red green and blue.\n\nTwo see an underlaying principle for this "chaos" we need the "Grand Unified Theory" which still is "work in progress" ;)