Newton’s law of cooling: [ Q = h , A , (T_s - T_\infty) ] [ 600 = h \cdot 0.5 \cdot (80 - 20) ] [ 600 = h \cdot 0.5 \cdot 60 = h \cdot 30 ] [ h = 20 , \textW/m^2\text·K ]
Heat moves through fluids (liquids and gases) via bulk movement of the molecules. 3. The Dragon’s Breath (Radiation) heat transfer example problems
Heat moves through empty space via electromagnetic waves; no medium required. Newton’s law of cooling: [ Q = h