3. A heated thin foil can be used to measure wind velocity. Consider a foil of length L = 25 mm, and width W = 8 mm, which is maintained at a constant temperature of 32C while dissipating 0.5 W from both sides into air flowing parallel to the foil at an ambient temperature of 20C. Assuming the flow is laminar, determine the free stream velocity V... (use v = 1.522 x 10-5 m/s, 0.0253 W/m2 C, and Pr = 0.72). k = Voo Ts = 32C L = 25 mm W = 8 mm