RyanfaeScotland wrote:I notice Randall uses billions for the world population but millions for the US population. Why is he being dishonest?
Wait, what?
I was expecting one of the pi approximations but there were none.
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RyanfaeScotland wrote:I notice Randall uses billions for the world population but millions for the US population. Why is he being dishonest?
Eshru wrote:RyanfaeScotland wrote:I notice Randall uses billions for the world population but millions for the US population. Why is he being dishonest?
Wait, what?
I was expecting one of the pi approximations but there were none.
Noir_Desir wrote:reminds me of my dad's easy way to do simple multiplications:
7*7? Just take 5*10 and subtract 1.
Tuinkabouter wrote:Even now you're too much of a mathematician to dare to say [imath]\pi \approx \sqrt{10}[/imath]. kudos.
mistapotta wrote:My favorite one is π=355/113, just to irritate my students who insist π is irrational.
355/113 is 3.14159292, so much better than 22/7.
smq wrote:Using several different calculators, I'm getting the Whitehouse Switchboard # as one digit off: .2024561414923965799[...] which works of you truncate but not if you round as would be expected. (The Whitehouse switchboard is 202-456-1414.) But then, I guess it is an approximation...
--SMQ
And so elegant, to boot. 2 1's, 2 3's, 2 5's. Write them in order, bisect and assemble the fraction, you'll never forget it.jqavins wrote:mistapotta wrote:My favorite one is π=355/113, just to irritate my students who insist π is irrational.
355/113 is 3.14159292, so much better than 22/7.
That's my favorite as well. It's good to better than 1 in 10^7, which makes it as good as perfect for very nearly all real world purposes. (For instance, in 1e-7 hours, an object moving at mach 2 covers less than ten inches.)
Van wrote:Fireballs don't lie.
Shidoshi wrote:ptorquemada wrote:Shidoshi wrote:The gas constant is expressed in J/gmol.K and not J/kgmol.K which would be the SI unit.
I've never seen the abbreviations "gmol" or "kgmol", but the SI units of the gas constant are Joules per mole Kelvin, and moles are defined as if they were based on grams instead of kg. Probably because the chemists threatened insurrection otherwise... grams are a much more convenient laboratory unit.
I've been recently through ChemEng and now they are starting to use "kilogram moles" and "gram moles", that way everything can be expressed in kg without much problem. Carbon12's molar mass is 12g/gmol or 12kg/kgmol (or even 12lb/lbmol if you swing that way). It's a somewhat new concept yeah, but it sure helps putting everything to SI and making less confusion.
bitwiseshiftleft wrote:Also, e^(pi * sqrt(163)) ~ 640320^3 + 744. But that one is famous. And was found by a method other than brute force.
alextrabec wrote:Randall wins again. P.S. You are all nerds fact checking a web comic. Great Job, make your professors proud! Also, your mom plus me makes a "That what she said joke" - Enjoy
Love the comics and nerds, keep it up bitches!
mistapotta wrote:My favorite one is π=355/113, just to irritate my students who insist π is irrational.
355/113 is 3.14159292, so much better than 22/7.
Klear wrote:Noir_Desir wrote:reminds me of my dad's easy way to do simple multiplications:
7*7? Just take 5*10 and subtract 1.
How is that better than "Just take 50 and substract 1", or even: "7*7? Just take 49 and you're done"?
Edit: Also 7*7 is trivial since everybody knows 6*7=42.
deoxys9 wrote:This would make an excellent poster. I'd buy it in a heartbeat. They're just so elegant and cool!
somebody_else wrote:The error in the first Protip is pretty big though. If only the fractions were added instead of subtracted. I am going to use the radius of the earth one from now on - just to confuse anyone reading my work.
San Fran Sam wrote:quote]
What do you get if you multiply six by nine?
San Fran Sam wrote:Klear wrote:Noir_Desir wrote:reminds me of my dad's easy way to do simple multiplications:
7*7? Just take 5*10 and subtract 1.
How is that better than "Just take 50 and substract 1", or even: "7*7? Just take 49 and you're done"?
Edit: Also 7*7 is trivial since everybody knows 6*7=42.
What do you get if you multiply six by nine?
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