Resistance Formulae

The resistance per unit length can be calculated from the resistance formula of the linear conductor if the outer diameter d, the wall thickness s, and wall cross-section S = Tis (t/ - 5) are known ... 

Potential Distribution at Ground Level 24.3.1 Soil Resistance Formulas... 

Table 10.15 Resistance formulae for submerged anodes of various geometries...

A preliminary design for each members will be accomplished through the use of required resistance formulas then check for response to time dependent toads. Final design would require evaluation of connections, bracing and other items which would prevent the members from reaching their plastic capacity. 

Add UV-absorbing compounds to a skin moisturizer and you have sunblock lotion. Making a sunblock lotion water resistant, however, is problematic. Upon exposure to water, the surfactants within the lotion help to remove the lotion. Manufacturers generally recommend that you reapply the lotion after swimming. Lotions that minimize the use of surfactants have increased water resistance, but they tend to be oily or greasy. For these reasons, many water-resistant formulas include compounds that polymerize into a nonpolar, water-resistant film that helps to hold the sunscreen agent on the skin when wet. 

Kouwen seemed to be the first among hydraulicians who doubted yet in 1969 the ability of traditional resistance formulas to correctly represent the role of vegetation, its possible features (solidity or flexibility) and characteristics like its height and spacing (density) [86], In his experimental work, he introduced an empirical slip velocity taken proportionally to the velocity gradient outside the penetrable block . Later, he carried out the experiment with a flexible artificial grass in a laboratory flume [350],... 

The basic theory of mine (full-space) TEM is basically in line with that of ground TEM. But the difference between them is that mine TEM can only be detected by multi-turn small loops, because it is used in the limited space of underground tunnel. There are certain multiples between full-space and half-space for late apparent resistivity of TEM. Therefore the late apparent resistivity of mine TEM can be calculated through the half-space TEM apparent resistivity multiplied by a coefficient K , mine TEM apparent resistivity formula is (Liu Zhixin 2008, Yu Jingcun 2007). 

Strommen R. Evaluation of anode resistance formulas by computer analysis. Corrosion/84. Paper no. 253, Houston, Texas NACE, 1984. 

I. Empirical resistance formula deduced from the l/7th power velocity distribution law... 

Fig. 9. Relationship between pipe friction coeilicient X and Re3molds number for various pulp water suspensions. I depicts the theoretical equation of the flow resistance in laminar flow in pipe and II depicts the Blasius resistance formula of turbulent flow. Cp, % , 0 (Water) , 0.30 , 0.55 v, 0.72----. Adapted from Figure 9 of Ref. 166.

Table 8-11. Common resistance formulas for cathodic protection of offshore installation ...

In a steady-state analysis, a grounding impedance is almost always modeled by the grounding resistance R. There are a number of resistance formulas proposed in various References 1, 2, 3, 4 and 5. Among these, Sunde s formulas are well-known and widely used [3,21] ... 

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