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Help figuring out units in a power fit.

  1. Jan 29, 2013 #1
    The equation of interest is:
    A=B*V^n

    where A has units of W/(m^2*K)
    W=watt, K=kelvin, m=meter
    V has units of m/s.

    B and n are parameters to be determined.


    I have a set of values that I put into excel to generate a plot. From the plot, I fit a power trendline to it and got the equation to be
    A=20x^3


    Should B and n have units?
     
  2. jcsd
  3. Jan 29, 2013 #2

    Dick

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    n doesn't have units. It's just 3. But A, B and x should definitely have units. You already know the units for A and x. You just need to find the units for B.
     
  4. Jan 29, 2013 #3
    it should be (for C):
    W/[m^2 * K * (m/s)^3]
    where n=3
    correct?
     
  5. Jan 29, 2013 #4

    Dick

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    If you mean the units for B, yes!
     
  6. Jan 29, 2013 #5
    Yeah, oops, thanks.
     
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