lb/ft3 1 lb/ft3 = 16.018kg/m3РPressure 1 kPa = 0.145 psi 1 psi = 6.8948kPaР 1 atm = 14.7 psi = 101.35kPaРEnergy and Power 1J = 1.00 W·s = 0.7376 ft lbf 1 ft lbf = 1.3558JР 1 kJ = 0.2778 W·h = 0.948 Btu 1 Btu = 1.0551kJР 1 W = 0.7376 ft lbf/s = 3.4122 Btu/h 1 ft lbf/s = 1.3558WР 1 kW = 1,3410 hp 1 hp = 550 ft lb/s = 0.7457kWРFlow 1 L/s = 15.85 gal/min = 2.119ft3 /min 1gal/min = 0.1337ft3 /min = 0.0631L/sРConcentration mg/L = ppmm (in dilute solutions)РTemperature °C = (°F − 32) × 5/9 °F = (°C × 9/5) + 32РFundamental Acceleration of gravity 32.2ft/s2 = 9.81m/s2РConstants and Density of water (at 4 °C) = 1,000kg/m3 = 1g/cm3РRelationships Specific weight of water (15 °C) = 62.4lb/ft3 = 9,810N/m3Р Weight of water 1gal = 8.345 lbs = 3.7854kgРSeismic Evaluation and Retrofit of Existing Buildings ix
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