fafalone Posted December 11, 2002 Share Posted December 11, 2002 What's your favorite equation from chemistry/physics/mathematics? If yours isn't listed, choose other and reply with it! Link to comment Share on other sites More sharing options...
fafalone Posted December 11, 2002 Author Share Posted December 11, 2002 1: The Universal Gas Law, pressure * volume = moles * gas constant * temperature in kelvin 2: energy of massive body not in motion, energy = mass * the speed of light squared 3: force = mass * acceleration 4: Euler's equation; relating the 5 most important numbers in math 5: Gravitation, force of gravity between 2 bodies = -constant * mass1*mass2 / radius squared 6: ultraviolet voodoo! 7: pythagorean theorem, c= hypotenuse 8: quadratic formula 9: energy of a wave Link to comment Share on other sites More sharing options...
Sayonara Posted December 11, 2002 Share Posted December 11, 2002 Someone doesn't know how to type a ² character Link to comment Share on other sites More sharing options...
fafalone Posted December 11, 2002 Author Share Posted December 11, 2002 hey, who do you think added the superscript and subscript tags, as well as all the other symbols? I wasn't sure if vBul. commands would be rendered on the front page; and i wasn't going change it if it wasn't, so i just played it safe Link to comment Share on other sites More sharing options...
Sayonara Posted December 11, 2002 Share Posted December 11, 2002 Hold down 'Alt' and type 0178 Link to comment Share on other sites More sharing options...
fafalone Posted December 11, 2002 Author Share Posted December 11, 2002 Superscript is better, because the Western character set only has 0, 1, 2, 3. alt+0178 is the losers way Link to comment Share on other sites More sharing options...
Sayonara Posted December 12, 2002 Share Posted December 12, 2002 Alt 0178 is quicker. Quicker is better. <Homer> Do you want it done right, or fast? </Homer> You said yourself you didn't know if sup would work - there would have been no question that Alt 0178 would work. Looooooooser Link to comment Share on other sites More sharing options...
blike Posted December 12, 2002 Share Posted December 12, 2002 I would just like to point out that you got the quadratic formula wrong. NICE ALGEBRA SKILLS For the record, it is -b +- sqrt(b² - 4(a)©) / 2(a) Link to comment Share on other sites More sharing options...
fafalone Posted December 12, 2002 Author Share Posted December 12, 2002 typo. NICE PARENETHESES SKILLS, YOU SCREWED IT UP BIG TIME, NO WAY DOING IT IN THE ORDER YOUR FORMAT GIVES WOULD GIVE THE RIGHT ANSWER. Link to comment Share on other sites More sharing options...
fafalone Posted December 12, 2002 Author Share Posted December 12, 2002 Originally posted by Sayonara³ Alt 0178 is quicker. Quicker is better. <Homer> Do you want it done right, or fast? </Homer> You said yourself you didn't know if sup would work - there would have been no question that Alt 0178 would work. Looooooooser Actually, if you're using the Cyrillic character page to view the site, it will not display properly, it displays as 'I'. Link to comment Share on other sites More sharing options...
Sayonara Posted December 12, 2002 Share Posted December 12, 2002 OMG. Link to comment Share on other sites More sharing options...
fafalone Posted December 13, 2002 Author Share Posted December 13, 2002 e^x is equal to an infinite series by Taylor expansion: 1+x^n/n! This series should look familiar, the even powers are the series for cos(x) (2n), and the odd powers are the series for sin(x) (2n+1) So, e^x = cos(x) + i*sin(x) cos(pi) + i*sin(pi) = -1 and -1 + 1 = 0 Link to comment Share on other sites More sharing options...
DocBill Posted March 18, 2003 Share Posted March 18, 2003 My favorite is the Drake Eq. N = R* × fp × ne × fl × fi × fc × L My 2nd is favorite is Einstiens most missunderstood eg. E= M X 1.15/ .99 Bill Link to comment Share on other sites More sharing options...
XxSuprNovaGrlxX Posted April 5, 2003 Share Posted April 5, 2003 My favorite equation would definetly have to be the Drake equation which (correct me if i'm wrong) gives either a pessimistic or opptimistic (depending on the person) estimation of the number of technological civilizations in the Milky Way Galaxy...it goes a little something like this: Nc = N* x Fp x Nl2 x Fl x Fi x Fs i'm not quite sure on what each letter represents...( being the idiot i am didn't write it down) but i'm sure either fafalone or blike can assist in figuring that out for whomever is interested Link to comment Share on other sites More sharing options...
NSX Posted April 11, 2003 Share Posted April 11, 2003 I remember reading about the derivative or integration of -inifinity or infinity; that's pretty cool. Anyone know it offhand? Link to comment Share on other sites More sharing options...
spamonkey8 Posted June 3, 2005 Share Posted June 3, 2005 god, as always, e=mc2 gets the votes simply because people recognize it better Link to comment Share on other sites More sharing options...
Guest maltesemike Posted June 3, 2005 Share Posted June 3, 2005 the Schrodinger Wave Equation kicks asse! Not like i have used or applied it before but we had to learn it in a module this year and i thought it looked pretty cool. Link to comment Share on other sites More sharing options...
alan2here Posted July 7, 2005 Share Posted July 7, 2005 z = z² + c This ifinitly complex mandlebot set equation I dont really understand how it works, I use fractals for art more than maths http://www.with-logic.co.uk/Frac.htm My fractals showcase site whats the equation for sin? Link to comment Share on other sites More sharing options...
Yggdrasil Posted July 7, 2005 Share Posted July 7, 2005 Some of my favorite equations: 1) Fourier transform 2) Definition of Gibbs free energy [math]\Delta G = \Delta H - T \Delta S[/math] 3-6) Maxwell's equations Link to comment Share on other sites More sharing options...
BobbyJoeCool Posted July 15, 2005 Share Posted July 15, 2005 [math]\frac{n^3+3n^2+2n}{6}=x[/math] Where x is the sum of the first n triangular numbers (explained later) Just because it got me into the State Math Competition when I was in High School... A "triangular number" (in this example) is definded as the sum of the first n numbers. eg "n"th triangular number is 1+2+3....+n=x. so, when n=2, x=1+2=3. When n=10, x=1+2+3+4+5+6+7+8+9+10=55. The question I had to answer, what is the sum of the first 155 triangular numbers (with no calculator)... I had three minutes to get enough points to qualify... well, [math]1+2+3+4+5...+n=\sum_{n=1}^{n}{n}=\frac{n(n+1)}{2}[/math] so I needed to figure out (with no calculator) [math]1+3+6+10...=\sum_{n=1}^{n}{\frac{n(n+1)}{2}}=\frac{n^3+3n^2+2n}{6}[/math] Thus allowing me to get my answer... [math]\frac{(155)^3+3(155)^2+2(155)}{6}=632710[/math] Link to comment Share on other sites More sharing options...
Daecon Posted July 15, 2005 Share Posted July 15, 2005 My favourite equation? Eleven + two = twelve + one. Link to comment Share on other sites More sharing options...
alan2here Posted July 15, 2005 Share Posted July 15, 2005 Dont post spam Could some mod plz delete my post and the one before it. Link to comment Share on other sites More sharing options...
Daecon Posted July 18, 2005 Share Posted July 18, 2005 Well I did also answer the poll too. I chose the Pythagoral equation, as I think it's pretty neat. BTW - If that post offended you so much that you felt it important enough to include your own post, doing nothing more than requesting the deletion of them both- you should have just sent me a PM stating your objections. Antony. Link to comment Share on other sites More sharing options...
□h=-16πT Posted July 18, 2005 Share Posted July 18, 2005 [math]e^{i\pi}+1=0[/math] or [math]R_{\alpha\beta}-\frac{1}{2}g_{\alpha\beta}R=8\pi T_{\alpha\beta}[/math] Link to comment Share on other sites More sharing options...
Evangelante Posted July 20, 2005 Share Posted July 20, 2005 Link to comment Share on other sites More sharing options...
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