THE SCIENCE AND APPLICATIONS OF ACOUSTICS - H. H. Arnold ...

Appendix A. Physical Properties of Matter 631A.3. Gases (at 1 atmosphere pressure, 101.3 kPa)Characteristic CoefficientRatio of Impedance, of ShearTemperature Density, ρ 0 Specific Speed ρ 0 /c Viscosity ηGas ( ◦ C) (kg/m 3 ) Heats, γ (m/s) (Pa·s/m) (Pa·s)Air 0 1.293 1.402 331.6 428 0.000017Air 20 1.21 1.402 343 415 0.0000181Hydrogen 0 0.09 1.41 1269.5 114 0.0000088CO 2 (low frequency) 0 1.98 1.304 258 512 0.0000145CO 2 (high frequency) 0 1.98 1.40 268.6 532 0.0000145Oxygen 0 1.43 1.40 317.2 453 0.00002Steam 100 0.6 1.324 404.8 242 0.000013A.4. Conversion FactorsConversely,To Convert Into Multiply by Multiply byatm (atmosphere) mmHg at 0 ◦ C 760 1.316 × 10 −3lb/in. 2 14.70 6.805 × 10 −2N/m 2 (Pa) 1.0132 × 10 5 9.872 × 10 −6kg/m 2 1.033 × 10 4 9.681 × 10 −5◦ C (Celsius) ◦ F (fahrenheit) [( ◦ C × 9)/5] + 32 ( ◦ F − 32) × 5/9cm (centimeter) in. (inch) 0.3937 2.540ft (foot) 3.281 × 10 −2 30.48m (meter) 10 −2 10 2cm 2 (square centimeter) in. 2 0.1550 6.452ft 2 1.0764 × 10 −3 929m 2 10 −4 10 4cm 3 (cubic centimeter) in. 3 0.06102 16.387ft 3 3.531 × 10 −5 2.832 × 10 4m 3 10 −6 10 6dyne lb (force) 2.248 × 10 −6 4.448 × 10 5N (newton) 10 −5 10 5dynes/cm 2 lb/ft 2 (force) 2.090 × 10 −3 478.5N/m 2 (Pa) 10 −1 10ft (foot) in. (inch) 12 0.08333cm (centimeter) 30.48 3.281 × 10 −2m (meter) 0.3048 3.281ft 2 (square foot) in. 2 144 6.945 × 10 −3cm 2 9.290 × 10 2 0.010764m 2 9.290 × 10 −2 10.764ft 3 (cubic foot) in. 2 1728 5.787 × 10 −4cm 3 2.832 × 10 4 3.531 × 10 −5m 3 2.832 × 10 −2 35.31hp (horsepower) W (watt) 745.7 1.341 × 10 −3in. (inch) ft (foot) 0.0833 12cm (centimeter) 2.540 0.3937m (meter) 0.0254 39.37(continued)