Cdp Ef

the woman. Solution: For water at 20°C, take ρ = 1.94 kg/m3. For air at 5000-ft standard altitude (Table A-6) take ρ = 0.00205 kg/m3. If Reynolds number is unimportant, then the two cases have the same drag-force coefficient: CDm = Fm 450 160 = = CDp = , 2 2 2 2 2 ρm Vm Dm 1.94(20) (Dp /15) 0.00205Vp D2 p solve Vp ≈ 24.5 ft s Ans. 5.73 The power P generated by a certain windmill design depends upon its diameter D, the air density ρ, the wind velocity V, the rotation rate Ω, and…