Recent content by snowjoe

is it not true that in a Coulomb there are 1.6 e19 units of charge, this unit of charge being the charge carried by one electron or proton?

Thanks, SS, But I'm asking about the math, where did i go wrong in calculating a nC by dividing 1.6e19 by e9?

N(1.6e-19)=e-9 N=e-9C/1.6e-19C = 6.25e9 = nC ?? then what is the flaw in calculating a nC by dividing C by n, as 1.6e19/e9 = 1.6e10

so, a billionth of a Coulomb is 1.6e-10, and a billionth of the particles in a Coulomb is 6.25e-9?

thank you.

yeh, math, logical, mind, not so much, sometimes

then my problem is the relationship between electrons/protons and Coulombs. How would one calculate the number of e/p in a fraction of a Coulomb, such as one billionth, a nC?

i grow confuseder, this radius is in meters, no? yet i'mgetting values that are out of the realm of possibility. square the point charges, which are nC, which is on the order of e10, so squared, e20. multiply this by k, which is on the order of e9, getting e29, so the square root of this is...

a Coulomb i take is 1.6 X e19 units of charge

rude man, isn't an nC a C/e9? which gives nC as 1.6 * e (19-9) 10? value of k i am using 9 as approximation, good enough, k= 9.0 e9

1. How far apart must two point charges of 75.0 nC be to have a force of 1.00 N between them?Homework Equations F = k Q1Q2/r2[/B]3. 1N = 9e10 * 75e-10 squared/r squared r2= 9e10 * 75e-10 squared/1N r2= 9*75*75e-10 r2= 5.0625e-7 r= square root of 5.0625 * square...

Thanks, you explained this beautifully

i know, the math makes sense, but i can't see my way around the logical demand that a fractional part of a quantity is that fraction because it takes the amount denominated to equal the whole quantity. the example of .2 follows this logic, five .2s equal the whole, .2 is the fraction 1/5

still, .2 is 1/5. and 5x = y so if a quantity is 1/ 15 millionth of another it would take 15 million of that quantity to equal that other, as it requires 5 of the amount that is 1/5 (.2) of another to equal that other amount

thank you. i may be getting stupid, but why isn't the number of e or p 1.6 e19, if each e or p, basic charge, has a charge there's something I'm not getting. if a quantity x was 1/10th of y, it would take 10 x's to make y. why not 1.6 e19 e or p to make 1 C?