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Problem 1.1

(i) 1 ft = 0.305 m (ii) 1 lb m = 0.454 kg (iii) 1 lb f = 4.45 N (iv) 1 HP = 746 W (v) 1 psi = 6.9 kN m-2 (vi) 1 lb ft s-1 = 1.49 N s m-2 (vii) 1 poise = 0.1 N s m-2 (viii) 1 Btu = 1.056 kJ (ix) 1 CHU = 2.79 kJ (x) 1 Btu ft-2 h-1 o F-1 = 5.678 W m-2 K-1 Examples: (viii) 1 Btu = 1 lb m of water through 1 o F = 453.6 g through 0.556 o C = 252.2 cal = (252.2)(4.1868) = 1055.918 J = 1.056 kJ

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