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Calculate the amount of radiation emitted for a unit surface (1 m²) for the following situations. Express your answers in both SI units (in W) and U.S. Customary units (in Btu/h).
(a) a hot pavement in Arizona at 52°C (125.6°F) and & ≈ 0.84
rate in W
rate in Btu/h
W
Btu/h
(b) a hood of a car at 44°C (111.2°F) and & ≈ 0.91
rate in W
W
rate in Btu/h
Btu/h
(c) a sunbather at 38°C (100.4°F) and & ≈ 0.91
rate in W
W
rate in Btu/h
Btu/h

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