The formula is given by:
\[ Q = \varepsilon \sigma A T^4 \]
where:
\( Q = 350 \, \text{W} \) (heat transfer rate),
\( \varepsilon = 0.6 \) (emissivity of the surface),
\( \sigma = 5.67 \times 10^{-8} \, \text{W/m}^2\text{K}^4 \) (Stefan-Boltzmann constant),
\( A
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