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Multiplying equations - spiral coil heat transfer

  1. Aug 1, 2011 #1
    "multiplying equations" - spiral coil heat transfer

    Hi, I was wondering if anyone could explain to me what is meant in this article by "Multiplying equations 8 & 9". I have both equation 8 and equation 9 however I cannot seem to work out how to get equation 10...not sure if it's something simple I'm missing, thanks in advance.

    9vees8.png
     
  2. jcsd
  3. Aug 1, 2011 #2
    Re: "multiplying equations" - spiral coil heat transfer

    That means [itex]\mbox{LHS of (8)} \times \mbox{LHS of (9)} = \mbox{RHS of (8)} \times \mbox{RHS of (9)}[/itex]. (Although I don't quite understand how they get from there to (10).)
     
  4. Aug 1, 2011 #3
    Re: "multiplying equations" - spiral coil heat transfer

    Ok cheers, I did try that but I couldn't get it. Will have to try again, thanks :)
     
  5. Aug 2, 2011 #4
    Re: "multiplying equations" - spiral coil heat transfer

    Thanks for your help, didn't end up needing to multiply them just required a lot of tedious manipulation!
     
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