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12:11 AM

@Mostafa One of the reason they started the PO is that there is problem with the community here. So it is natural to question their ability to host a new one. It doesn't relate to their knowledge on physics.

In general, most people want a high quality website. people in MO don't have such problem with them so naturally support them. But who know what is the resutls.

Birth of 'new Saturn moon' witnessed: bbc.com/news/science-environment-27056698

Shahar

1:02 AM

yo guys

$$\vec{E}=\rho\vec{J}$$ and $$I=Nev_dA$$

What are these equations?

@hwlau Can you tell me what those equations are called?

Or @LoganM or @ManishEarth if you guys are there

ManishEarth

$\vec{E}=\rho\vec{J}$ is Ohm's law

the real ohm's law

Shahar

Oh.. What I thought it was just $\epsilon = IR$

ManishEarth

(usually written as $\vec{J}=\sigma\vec E$)

Ohm's law

Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship: :I = \frac{V}{R}, where is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant,...

It's both, sort of

Shahar

And then what's the Nevada thing?

ManishEarth

uh, derivable from the definition of current and number density?

Not all equations have names

Shahar

1:07 AM

Well I mean what do I use it to solve for

ManishEarth