Unit Conversion Constants

C Coefficient Cd is drag coeffi- 9c Units conversion constant... 

For simplicity, in this equation, we have assumed that activities are equal to concentrations and brackets refer to activities. C is a units conversion constant = Vy m relating void volume Vy (mL) in the porous media and the mass m (g) of the aquifer material in contact with the volume Vy, is the formation constant for an aqueous uranyl complex, and the superscripts i, j, k describe the stoichiometry of the complex. The form that the sorption binding constant takes is different for the different sorption models shown in Figure 4 (e.g., see Equation (5)). Leckie (1994) derives similar expressions for more complex systems in which anionic and cationic metal species form poly dentate surface complexes. Equation (7) can be derived from the following relationships for this system ... 

K = proportional feedback controller gain C2 = unit conversion constant for controller, ma/°K G3 = steady-state controller output (ma)... 

Eor simplicity, in this equation, we have assumed that activities are equal to concentrations and brackets refer to activities. C is a units conversion constant = m , relating void volume Vy (mL)... 

Invert Eq. (4.49) and substitute. The ratio of gas constants is convenient for unit conversion ... 

The unit conversion of t from inches to feet does not affect the optimum LID), nor do the values of p and S, which are multiplicative constants. The modified objective function, substituting Equation (/) in Equation (j), is therefore... 

Appendix. Conversion Factors for Commonly Used Units Universal Constants... 

In US Customary units, the constant 1 000 shall be changed to 12. This constant is the conversion factor to change millimetres to metres or inches to feet. 

X 105 = constant value assuming a G value of 0.66, molar extinction coefficient of 2200 at 25°C., density of 1.024, and unit conversion factors. 

Some formulas are of course sensitive to the units used. These include a conversion constant, a value which is given in Table 7.1 for some unit combinations. The formulas without such a conversion constant are not sensitive to the units used as long as the same units are used for the same data (all pressures, all specific volumes, etc.). 

Defined values for example, unit conversion factors, mathematical constants, or the values of constants used to relate some SI units to fundamental constants. 

The international system of units is described in detail in NIST Special Publication 81l,1 and lists of physical constants and conversions factors of selected unit conversions1 5 are given in the following tables. The conversions are presented in matrix format when all of the units are of a convenient order of magnitude. When some of the unit conversions are of tittle value (such as the conversion between metric tons and grains), tabular form is followed, with the less useful units omitted. 

Although individual line positions are given in velocity units, the quadrupole coupling constant is normally quoted in MHz. This facilitates comparison with NQR data. Moreover, data for 129I are usually converted into the value corresponding to 127I, again to assist comparisons. The conversion constants used are ... 

Refs. [i] The National Institute of Standards and Technology (NIST) Reference on Constants, Units, and Uncertainties (2003), http //physics.nist.gov/cuu/constants [ii] Mills I (2004) Chemistry International (IUPAC) 26(3) 17 [iii] Mills I, Cvitas T, Homann K, Kallay N, Kuchitsu K (eds) (1993) IUPAC quantities, units and symbols in physical chemistry. Blackwell, Oxford, p 58 [iv] Cardarelli F (1997) Scientific unit conversion. A practical guide to metrication. Springer, London... 

At 0.27 hp (0.20 kW), a constant viscous power number can be used to predict an apparent viscosity, with the aid of a 6.11 x 1CV15 units-conversion factor ... 

Unfortunately, the table of gas constants at the back of this book does not list the value of R with this particular set of units. In its absence, we use an available value and carry out the necessarv additional unit conversions. 

The one drawback to this transmitter is the short battery life. This is a result of the unit being constantly "on" as long as the battery is in place. Anyone with a fair amount of electronic skill can tap into the battery circuit of the mike and install a voice activated switch on the bug. This adds little bulk and allows the bug to function for weeks. The bug transmits only when conversation in the room triggers the voice activated switch. When the conversation ceases, the unit remains on for five seconds and then switches off. This is... 

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