Using the conversion factors between W and Btu/h, m and ft, and K and R, express the Stefan–Boltzmann constant ? = 5.67 × 10?8•W/m2•K4 in the English unit Btu/h•ft2•R4.
What will be an ideal response?
Using the conversion factors between W and Btu/h, m and ft, and K and R, the Stefan-Boltzmann constant 
is to be expressed in the English unit, 
Analysis The conversion factors for W, m, and K are given in conversion tables to be
1 W = 3.41214 Btu/h
1 m = 3.2808 ft
1 k = 1.8 R
Substituting gives the Stefan-Boltzmann constant in the desired units,
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