Area squares

Wetted Area" (square feet) Venting Requirement (cubic feet of free air " per hour) Wetted Area" (square feet) Venting Requirement (cubic feet of free air per hour)... 

FLOOR AREA (square metres) excluding corridors and common areas etc. 

Specific surface area (square meters per gram or square centimeters per gram) the sum of the external and the internal surface areas. 

Figure 2. - Pulse reaction studies results. Left Hydrogen to Consumed Propane Ratio. Right Methane produced as integrated area. Squares - catalyst with 2 wt.% of gallium. Circles - catalyst with 3 wt.% of gallium.

A No known as Diamond Pyramid Hardness. Indcnter is a square-hased diamond pyramid with included angle between faces of 136°. Loads may vary1 from 1 to I 20 kilograms with 10. 30. and 50 kilograms in common use. Hardness is equal to load (kilogramsi divided hy surface area (square millimeter) of the permanent indentation, ll is determined directly from oplical measurements of the diagonals of the indentation, which appear square at Ihe surface of the metal. 

The common sieves are made of woven wire cloth and have square apertures. The sizes of the sieve openings have been standardized, and currently two different sets of standard series, the Tyler Standard and the U.S. Series ASTM Standard, are used in the United States. The mesh number of a sieve is normally defined as the number of apertures per unit area (square inch). Thus, the higher the mesh number the smaller the aperture. Typical mesh numbers, aperture sizes, and wire diameters are given for the lyier sieves and the U.S. ASTM sieves in Table 1.3. Sieve analysis covers the approximate size range of 37 pm to 5,660 pm using standard woven wire sieves. Electroformed micromesh sieves extend the range down to 5 pm or less while punched plate sieves extend the upper limit. 

Fig. 12.10 Chlorine-36 as a function of chlorine for the Murray-Malee study. Symbols designate the reported formation from which the water was sampled Murray group (+), Murray group at discharge areas (squares), Renmark group (circles), Pliocene aquifer (triangle). The local intake line was based on unconfined water samples. The data fall on this line or beneath it, indicating old ages.

Specific surface area Square meter per kilogram m2 kg 1 ... 

Figure 3. Plot of Polar Dynamic Surface Area (square angstroms) and fractionally absorbed dose in humans, for 20 selected compounds (data from Palm et al [10]).

The linear velocity of gas flow in a vacuum is also dependent on the cross-sectional area of the reactor in which the flow takes place. Therefore, a parameter describing the linear velocity of a flow is given by FjA p, where A is the cross-sectional area (square centimeters). The value of FjA p for a flow of 50 seem in a bell jar of 50-cm diameter at 1 torr is 19.4cm/min, whereas the value of FjA p for a flow of 5 seem in a tube of 5-cm diameter at 0.1 torr is 1940cm/min. 

Because total air volume is the product of air-flow velocity (meters per second), orifice cross-sectional area (square meters), and time (seconds) any of these parameters could be changed in theory. In practice, a continuously variable orifice is difficult to build therefore, this value is fixed. The requirement for isokinetic flow will dictate the air-flow velocity. Therefore, only sample time can be independently controlled. 

PROCESSED AREA SQUARE METERS 1 METER WIDTH... 

Capacities.—If n = number of cylinders, S = piston speed, feet per minute, a = piston area, square inches, pm = mean effective pressure, pounds per square inch, the indicated horsepower of a four-cycle single-acting engine is... 

Number of plates Filtering area, square feet Volumetric capacity, cubic feet ... 

Filter area, square feet Overall dimensions Outlet d diam- eter In- Capacities Ap- proxi- mate weight... 

The vapor pressure of N2 at — 195.8°C is 1 atm. Estimate the surface area (square meters per gram) of the sample. 

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