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any math people out there

Discussion in 'General Homebrew Discussion' started by hopsgrinder, Feb 13, 2012.

 

  1. #1
    hopsgrinder

    Active Member

    Posted Feb 13, 2012
    What percent of one pound is one ounce?
     
  2. #2
    weirdboy

    Well-Known Member  

    Posted Feb 13, 2012
    1/16 = .0625 = 6.25%
     
  3. #3
    hopsgrinder

    Active Member

    Posted Feb 13, 2012
    Thanx that helps
     
  4. #4
    Teromous

    Beer Gnome  

    Posted Feb 13, 2012
    Just for future reference, Google will do a lot of calculations for you...you just have to know all of the tricks. I have BeerSmith and I still use google for conversions.

    For example, type in the search bar: 1 ounce to percent pounds
    ...you will get: 1 ounce = 6.25 percent pounds

    Pretty cool stuff, once you get used to it.
     
  5. #5
    iaefebs

    Banned

    Posted Feb 13, 2012
    How come when I multiply 1 lb x 6.25 I get 6.25? is that metric?
     
  6. #6
    homebrewdad

    Well-Known Member

    Posted Feb 13, 2012
    I think you are asking the wrong question.

    One ounce is 1/16th of a pound, or 6.25%. 6.25 x 16 ounces = 100%, or one pound.
     
  7. #7
    D0ug

    Well-Known Member

    Posted Feb 13, 2012
    I think to "check the math" you want to multiple 6.25% * 16 oz.: 0.0625 * 16 oz = 1 oz.

    damn, homebrewdad beat me to it.
     
  8. #8
    weirdboy

    Well-Known Member  

    Posted Feb 13, 2012
    Because 1 x anything = anything
     
  9. #9
    homebrewdad

    Well-Known Member

    Posted Feb 13, 2012
    I am the simple math ninja.
     
  10. #10
    motobrewer

    I'm no atheist scientist, but...

    Posted Feb 13, 2012
    lol
     
  11. #11
    Cambone

    Well-Known Member

    Posted Feb 13, 2012
    I came in here looking for a math problem. I feel as if I have been tricked.
     
  12. #12
    iaefebs

    Banned

    Posted Feb 13, 2012
    Thanks:) I was getting worried here.
     
  13. #13
    DeafSmith

    Well-Known Member  

    Posted Feb 13, 2012
    Just for you:
    Find the integral of (t + 7t^2)^1/3 dt

    Show your work!

    :)
     
  14. #14
    iaefebs

    Banned

    Posted Feb 13, 2012
    Even Google seems stumped on that one:confused:
     
  15. #15
    Cambone

    Well-Known Member

    Posted Feb 13, 2012
    Nerd sniping. I was ready to do up a LaTex document and everything.

    [​IMG]
     
  16. #16
    Cambone

    Well-Known Member

    Posted Feb 13, 2012
    You're going to need more than google for this one...

    Matlab wont even chew through something like, symbolically at least.

    *EDIT* Just checked, matlab can't do it.
     
  17. #17
    D0ug

    Well-Known Member

    Posted Feb 13, 2012
    I'm sure the solution must be in one of those massive tables generated by the Russians on one of their math farms.
     
  18. #18
    DeafSmith

    Well-Known Member  

    Posted Feb 13, 2012
    I suppose I should admit that I didn't pick that one at random. Found it in Richard Feynman's "Tips on Physics", page22: "...for example, (t + 7t^2)^1/3 is not possible to integrate in an easy fashion,..."

    Feynman doesn't give the solution, and I certainly don't know it.
     
  19. #19
    weirdboy

    Well-Known Member  

    Posted Feb 13, 2012
    Google may not know the answer, but Wolfram Alpha does.
     
  20. #20
    AllHopAbandon

    Well-Known Member

    Posted Feb 13, 2012
    The indefinite integral of (t + 7t^2)^1/3 dt = 3t(7t+1)^1/3((7t+1)^1/3*(14t+1)-2F1(1/3,2/3;4/3;-7t))/(70*(7t+1)^1/3) + constant

    where 2F1(a, b, c; x) is the hypergeometric function.

    edit: Weirdboy, that's a very interesting site that I swear I have never heard of :D
     
  21. #21
    motobrewer

    I'm no atheist scientist, but...

    Posted Feb 13, 2012
    you didn't show your work.
     
  22. #22
    DeafSmith

    Well-Known Member  

    Posted Feb 13, 2012
    Heh, outing all the math nerds on HBT.
     
  23. #23
    Rushis

    Well-Known Member

    Posted Feb 13, 2012
    Ahh mathematica, as irritating as maple, without the practicality of matlab.
     
  24. #24
    spenghali

    Well-Known Member

    Posted Feb 13, 2012
    Wolframalpha is mind blowing stuff, especially because its free. Definitely helped me on some homework my last few years of college.
     
  25. #25
    chaserchap

    Well-Known Member

    Posted Feb 13, 2012
    Mathematica may not be as practical as MatLab, but it's definitely prettier :)
     
  26. #26
    weirdboy

    Well-Known Member  

    Posted Feb 13, 2012
    I most certainly did. That's what the search URL is!
     
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