On Fri, 31 Oct 2025, David wrote: > On Fri, 31 Oct 2025 at 22:09, David <[email protected]> wrote: > >> Hi, there's more explanation here: >> https://en.wikipedia.org/wiki/Drift_velocity > > Sorry, I forgot to mention, their example: > https://en.wikipedia.org/wiki/Drift_velocity#Numerical_example > > Similar to Thomas, calculates a drift velocity of 20 micrometers > per second for 1 ampere in a 2mm copper wire. > > But the final sentence on that page is interesting: > "By comparison, the Fermi flow velocity of these electrons (which, at > room temperature, can be thought of as their approximate velocity in > the absence of electric current) is around 1570 km/s." >
all that make my head hurt i program i saw recently about the sun said a proton created near the core can take millions of years to reach the surface talk about a traffic jam
