The SI unit of charge is the coulomb, and the fundamental unit of charge is e = 1.60 x 10⁻¹⁹ C.
Coulomb’s law gives the magnitude of the electrostatic force F between two charges q_1 and q_2 whose centers are separated by a distance r: F = k (q_1 q_2 / r²). The force always points along the line connecting the centers of the two charges.
Coulomb’s constant or the electrostatic constant k is: k = 1/(4πε_0) = 8.99 x 10⁹ (N · m²) / C², where the permittivity of free space ε_0 is: ε_0 = 8.85 x 10e⁻¹² C² / (N · m²).
Every electric charge sets up a surrounding electric field. The magnitude of the electric field can be calculated: E = F / q_0 = kq / r².
The direction of the electric field vector is the direction that a positive test charge +q_0 would move.
A collection of charges will exert a net electric field at a point in space equal to the vector sum of all electric fields: E_total = E_q1 + E_q2 + E_q3 + …
The electric potential energy is the amount of work necessary to bring a charge from infinity to that point and is: U = k qQ / r.
Opposite charges will have negative potential energy, and this energy is increasingly negative as the charges are brought closer together.
Electric potential is the ratio of the magnitude of a charge’s electric potential energy to the magnitude of the charge itself: V = W/q = kQ/r.
The potential difference, known as the voltage, between points a and b is: V_b - V_a = W_ab / q_0.
Positive charges move spontaneously from high voltage to low voltage, while negative charges move from low voltage to high voltage.
An equipotential line is one where the potential at every point is the same, such that no work is done when moving a test charge q_0 from one point to another on the line.
The electric dipole, which results from two equal and opposite charges being separated by a small distance d, can be transient or permanent.
The electric potential P of the dipole is the scalar sum of the potentials due to each charge: V = kq (r_2 - r_1) / (r_1 r_2) ≈ (kqd / r²) cos θ
The product qd is the dipole moment p with SI units C · m, such that V = (kp/ r²) cos θ.
The perpendicular bisector of the dipole is the plane that lies halfway between +q and -q, where the electric potential is zero. The electric field along the perpendicular bisector is: E = kp / r³.
The force applied to a dipole axis from the electric field generates torque and causes the dipole axis to rotate: τ = pE sin θ.
ElectroStatics albumZbigniew Karkowski mp3 download
- Artist - Zbigniew Karkowski mp3
- Album - ElectroStatics mp3
- Year - 2003
- Genre- Chill Out: Ambient
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Soundtrack - Various Artists albums
Jirm - Indie Rock Mixtape - May 2009 albums
I’m just wondering, but does anyone else on here find Electrostatics really cool? Spark gaps, frequency, capacitors, current, voltage, tesla, coils, and leyden jars - the kind of stuff that makes your hair stand up and shoots lighting? It’s all very Full-metal-alchemist. Van de graaff generators for example, converting mechanical energy to electrostatic charge. It’s equivalent-exchange-esque. And nerdy. But that’s okay here. School is starting in a few days, anyway.
vv why do you want to avoid tangents?
because they are gross.
i have a really hard time explaining why they are gross. it’s just…. it’s when two edges of something get on top of one another or when something is all up on the edge of the frame. I DON’T KNOW, BUT IT’S DISGUSTING.
except in secret of the kells. where it’s intentional and amazing @_@ i guess because they conflate the tangents into smooth, flowing shape things?? @_@
(forgive me for loving bruce+tony, softie ; ;)
aang wants to do it while flying and using his little like staff/flyer thingy and zuko is like no no nO NO NO NO NON OOOOO
“THIS IS A TERRIBLE RECKLESS IDEA”
“shh no it’s okay i won’t drop you and if it makes you feel better we can have appa spot us just in case!!!”
“HOW WOULD THAT MAKE ME FEEL BETTER”
this tag is to get to know the person behind the blog better. as with any tagging game there are rules:
- post the rules
- answer the questions the tagger set for you in their post and make 11 new ones
- tag 11 people, and link them
i got tagged again by bagels (tumblr user @poppysaide) and i’ll do the linking thing in 24 hours if it looks like you haven’t seen it! OMG I HAD TO RUN OUT TO DO A JOB INTERVIEW IN BETWEEN THIS BUT YEAH HI (‘: MEME TIME AGAIN! tell me if i accidentally double tagged you!
the hunger games is about a specific type of oppression: classism. it has nothing to do with race. katniss can be read as a poc, but that does not make her story about race. she gets treated differently because she's POOR.
ah yes, because race and class have nothing to do with one another whatsoever
Oh, oh! At Wondercon, Marissa told me to get a sketchbook for Vietnamese Tony sketches at cons, so I'm totally gonna do that, and the first pics that are going in there are going to be of the pictures you did. :')
NOOOO CRYINNNNGGGG I love Vietnamese Tony so much skdfjhadjf. When I was drawing him for that ‘House Stark’ fanart, I was colouring his suit and thinking of the meaning of red and gold and why he chose those colours and auggghhh my feelingsss.
I hope you share the sketches post-con, I would LOVE to oogle them. :D