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Radiation heat transfer - mistake in attached solution?

  1. Jan 30, 2013 #1
    I attached the problem of interest (probably the only part you guys need to see is the equations at the bottom).

    My answers are off by a magnitude of 10 compared to the solutions. (copy and pasted it below since the pic is a little hard to see at the bottom)
    q = σε f*A(T^4 − Ts^4 )
    = 5.67 Χ 10^−8 Χ ε Χ 1 Χ (π Χ 0.1^2 )(T^4 − 77^4 )

    = 1.7813 Χ 10 −8 ε (T^4 − 77^4 )

    When they did 5.67*10^-8 * 1 * pi * (.1)^2, they got 1.7813*10^-8.
    I plugged that into my calculator, but I got 1.7813*10^-9.

    Normally, I would think this was a typo, but in the next part (not included in image), they plotted values that were a magnitude of 10 different from mine. This has me thinking that I might have missed something.

    What do you guys think?

    Attached Files:

  2. jcsd
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