What is your favourite physical constant?Watch
I'm mainly asking those people who know it from memory.
Although its a pretty obvious one I'd say mine has to be Plank's 6.626x10^-34. Useful for so many things.
Planck's does come up quite a lot, but more often than not h bar. I always like the Stefan-Boltzmann constant it just flows nicely 5678, although I didn't use it very often.
that's true although (even though I do remember 1.055x10^-34) you only need to know plank rather than hbar.
Stephan-Boltzmann does flow nicely I always think the same about the age of the Earth (going by meteorites) 4.567 Ba.
- Study Helper
I don't really like universal physical constants because there isn't a reason why they're that number; they just are. They're arbitrary constants that you just have to deal with and use.
Physical constants come form those laws. Most are found empirically.
Haven't come across that before, looks like it might be more of a chemistry thing?<br />
Ahh the permittivity of free space, can you quote it from memory though?<br />
I'm guessing you mean 'e' in the mathematical sense because e is also used as the charge on an electron...
no i wish, i'm not even a physicist I'm a medic lol. it has the best sounding name tbh
But if it has to be more Physics-based, either the Avogadro constant or the gravitational constant.
It is, but that doesn't make it not physical? Physical doesn't mean physics. And it's part of physical chemistry which in itself is basically physics anyway.
I didn't say that it wasn't a physical constant. I haven't done too much chemistry I was simply saying that that might be why I hadn't heard of it.
S'all, no stress.