7 ms·
As a physicist, this makes sense. Pi = 3, pi^2 = 10, which is g Not sure why everyone is surprised. Ah, and a year is pi*10e9 seconds (IIRC)
by BrandoElFollito 2y ago
As a physicist, this makes sense. Pi = 3, pi^2 = 10, which is g
Not sure why everyone is surprised.
Ah, and a year is pi*10e9 seconds (IIRC)
- exe34 2y agopi * 1e7
- radiator 2y agoAs a physicist? When we did physics at school, and we were solving problems, the answer was always a number together with its unit. pi² might be 10 because it is a pure number, but g can never be 10, because it is an acceleration, a physical quantity, so it must be 10 of some unit.
- bmacho 2y agoNot if you define g as the real number before m/s^2, in the expression '10 m/s^2'. In middle school physics lessons this makes teachers to hate you (it's their job to ensure that you do not do this), but after that, this has advantages time to time. .. I remember hearing an anecdote that ancient Greeks did not know that numbers can be dimensionless, and when they tried to solve cubic equations, they always made sure that they add and substract cubic things. E.g. they didn't do x^3 - x, but only things like x^3 - 2*3*x. I don't think this is true (especially since terms can be padded with a bunch of 1s), but maybe it has some truth in it. It is plausible that they thought about numbers different ways than we do now, and they had different soft rules that what they can do with them.
- BrandoElFollito 2y agoOh, come on, it is inches / (day * "hold on"). Everyone knows this, this is physics for art majors 101. In guess it's a good thing I left physics after my PhD.
- jrpt 2y agoI mean it is pretty common to set c=1 though.
- CoastalCoder 2y agoI assumed the pi / g connection was because cows that accelerate in a vacuum are spherical.
- openrisk 2y agoI think it was Gauss who proved that any convex cow would work equally well. But we need to assume an infinitesimally thin and infinitely long tail as boundary condition.
- Sharlin 2y agoAccording to the Banach–Tarski paradox, if you accept the Axiom of Choice, you can disassemble a spherical cow and put the parts back together such that you end up with two cows of the original size. How exactly this affects Cow Economics is not well-understood.
- fouronnes3 2y agoAs a computer scientist this is not surprising either. After all there are only three numbers: 0 1 and n.
- 360MustangScope 2y agoYou mean the legendary “i”. There is no n.
- deleted 2y ago[deleted]
- de_nied 2y agoYea if you're some classical snob. - Posted by the quantum gang
- pansa2 2y agoRemember that `i` is also a number. As in `for i = 0 to n`. Don’t believe those mathematicians when they tell you that `i` is “imaginary”.
- Anarch157a 2y agoAll numbers are imaginary. sqrt(-1) should have been called w, for "weird".
- syockit 2y agoI use w for the complex roots of 1 though, when rewriting FFT notes.
- HPsquared 2y agoAnd int_max
- Maken 2y agoThat's a implementation detail.
- hyperhello 2y ago3600 seconds per hour, times 3*8 is only about 80,000 seconds a day. You can’t get to a billion from there.
- sa46 2y agoPi seconds is a nano-century. So 1 year = pi*10^7 seconds
- remuskaos 2y agoA year is pi 10^7, or pi 1e7. On the other hand, 10 e9 = 10 * 10^9.
- leoff 2y agoas a mechanical engineer, can confirm. also, e ≈ pi ≈ 3
- winwang 2y agoin fact, e = 2, made rather abundantly clear in "finite difference" calculus, and also that in computer science, the "natural" log base 2.
- Sharlin 2y agoThe pi in pi*10^9 seconds clearly comes from the fact that Earth’s orbit is circular.
- maxnoe 2y agoNore sure if serious or not, but anyway: 1) it isn't circular, although just barely (it's an ellipse) 2) the length of the day is not really related to the length of a year, and the second was defined as 1 / (24 * 60 * 60) = 1 / 86400 of the mean solar day length So this is really just a coincidence, there is no mathematical or physical reason why this relationship (the year being close to an even power of 10 times pi seconds) would exist.
- Sharlin 2y agoDefinitely not serious :) But from the fact that an Earth year happens to be roughly pi*10^7 seconds long, it follows that in 10^7 seconds Earth travels about two radians, or one orbital diameter, and equivalently that the diameter of Earth's orbit is roughly 10^7 seconds times Earth's orbital speed.
- deleted 2y ago[deleted]