So I started studying electrostatics 1 month ago and I understood much of it but there is one point that bothered me a lot and that my professor didn't even bother answering: "You are studying to be an engineer. So Knowing this is pointless." I tried to understand it by myself but I couldn't find an explanation for it.
Coulomb law is valid for point-like charges or systems that can be approximated to points. With the superposition of charges principle (principe de superposition des champs electriques) we can consider macroscopic systems as divided into elementary charged volumes/distances/surfaces (depending on the charge ) and then calculate the electric field made by that elementary charge and then integrate to get the electrical field made by the whole system.
However, my question is how can such a system be held together and doesn't collapse even though it is composed of many elementary charges which will produce forces between each other (whether attraction or repulsion) [some of the systems we studied is a sphere in which its whole volume is uniformly charged which means that the system should immediately collapse]
Sabine lists the typical Standard Model particles, but counts 8 gluon variations as separate particles, thus ending up with 25 unique particles (6 quarks, 6 leptons, 8 gluons, photon, W+, W-, Z, Higgs).
This is what it looks like in her book.
But from what I understand, the 8 gluons differ by their color+charge composition, e.g. red*antiblue+blue*antired / sqrt(2). But if you count them this way, then shouldn't you also count quarks as distinct by color (red, blue, green)?
As well, if you count W+ and W- bosons as separate, shouldn't you count a top quark and top antiquark as separate particles as well?
And to be completely consistent, shouldn't we then count other quantum properties as technically different particles? E.g. a left-handed vs. right-handed particle? Since the handedness of some particles can impact what interactions they can participate in, and some particles only have observed one-handedness (e.g. neutrinos), but others can come both ways?
Anways, just wondering if it's common, when counting elementary particles, to group some quantum properties as "not separate enough to count as a distinct particle, just different states of the same particle", but other quantum properties (or same quantum quantum of a different particle) as making a different distinct particle.
If you could just briefly tell me modern technologies that use the fundamental charge then that would be great.
Here’s my problem: 1 Coulomb is measured as 6.242e+18 elementary charges, and 1 elementary charge is 1.60218e-19 Coulomb’s. So I’m wondering: Where did these quantities come from if a Coulomb is measured in elementary charges and an elementary charge is measured in Coulomb’s?
An easy way to upset small child is for them to check out a book in their in-school library and forget they have a borrowed book at their home and NOW have to pay a fee of 20+ USD.
The schools I went to had policy of about a 25 cents PER DAY late for a book and there would be no reminders given to turn in a book. Sometimes there would be days where many students were called down to the library where the school librarian would scold out each student for about 5 minutes on what they owed back the school. The worst part about this is if they didn’t pay back the full price, the late fees will go ABOVE the original price.
Imagine a child coming home to or have to painfully wait for their parent(s) and tell them they have to give 20+ USD back to the school because they forgot/lost a library book. Not only is this a cruel and costly punishment (especially for people in poverty) but it’s a nasty move to by schools that practice it, just to make some quick cash.
I understand for adults and maybe high school students should have this responsible, but ELEMENTARY kids is where it crosses the line.
So I started studying electrostatics 1 month ago and I understood much of it but there is one point that bothered me a lot and that my professor didn't even bother answering: "You are studying to be an engineer. So Knowing this is pointless." I tried to understand it by myself but I couldn't find an explanation for it.
Coulomb law is valid for point-like charges or systems that can be approximated to points. With the superposition of charges principle (principe de superposition des champs electriques) we can consider macroscopic systems as divided into elementary charged volumes/distances/surfaces (depending on the charge ) and then calculate the electric field made by that elementary charge and then integrate to get the electrical field made by the whole system.
However, my question is how can such a system be held together and doesn't collapse even though it is composed of many elementary charges which will produce forces between each other (whether attraction or repulsion) [some of the systems we studied is a sphere in which its whole volume is uniformly charged which means that the system should immediately collapse]
