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Mechanical Engineering QUESTION #2419
Question 1
The Stefan-Boltzmann Law gives the maximum heat flux emitted by a blackbody surface at absolute temperature \(T_s\) as:
  • \(q''_{SB} = \sigma T_s^2\)
  • \(q''_{SB} = \varepsilon\sigma T_s^4\)
  • \(q''_{SB} = \sigma T_s^4\) (blackbody, \(\varepsilon=1\))✔️
  • \(q''_{SB} = h_r(T_s - T_{surr})\)
Correct Answer Explanation
Stefan-Boltzmann Law for a perfect blackbody (\(\varepsilon=1\)): \(q''_{SB}=\sigma T_s^4\) where \(\sigma=5.67\times10^{-8}\) W/m²·K⁴.