Approximations, maybe, but not necessarily very mnemonic, are they? I mean, Avogadro's Constant was pretty much drummed into me at school, and 6.02x10^23 is a bit easier (for me) to remember than 69^pi^sqrt(5).
(though, having said that, a lot of what was drummed in is no longer used, or defined differently at school, e.g. molar volume is no longer 22.4 litres at 273K and 760mmHg, it is 25 litres at 298K, which I suppose is nicer, because who wants to measure gas volume when it's that cold?)
Approximations, maybe, but not necessarily very mnemonic, are they?
ReplyDeleteI mean, Avogadro's Constant was pretty much drummed into me at school, and 6.02x10^23 is a bit easier (for me) to remember than 69^pi^sqrt(5).
(though, having said that, a lot of what was drummed in is no longer used, or defined differently at school, e.g. molar volume is no longer 22.4 litres at 273K and 760mmHg, it is 25 litres at 298K, which I suppose is nicer, because who wants to measure gas volume when it's that cold?)
4*ATAN(1)
ReplyDeleteShowing your age there - pi (or rather M_PI) has been defined in math.h for years!
ReplyDeleteMore of an identity, rather than an mnemonic
ReplyDeleteHow Much Pi Do You Need?
ReplyDeleteA not-very-good approximation is that pi seconds is a nano-century.
ReplyDeleteSpeed of light may not be constant, physicists say
ReplyDelete