Radius of sphere

L = distance between receiving surface and sphere s center (m) r = radius of sphere (m)... 

Legendre s functions of the first and second kind with real argument Legendre s functions with imaginary argument radius of sphere radius vectors... 

Radius of sphere defining the effective atomic region, electron density being integrated in this sphere. 

Diffusion time (diffusion time constant) — This parameter appears in numerous problems of - diffusion, diffusion-migration, or convective diffusion (- diffusion, subentry -> convective diffusion) of an electroactive species inside solution or a solid phase and means a characteristic time interval for the process to approach an equilibrium or a steady state after a perturbation, e.g., a stepwise change of the electrode potential. For onedimensional transport across a uniform layer of thickness L the diffusion time constant, iq, is of the order of L2/D (D, -> diffusion coefficient of the rate-determining species). For spherical diffusion (inside a spherical volume or in the solution to the surface of a spherical electrode) r spherical diffusion). The same expression is valid for hemispherical diffusion in a half-space (occupied by a solution or another conducting medium) to the surface of a disk electrode, R being the disk radius (-> diffusion, subentry -> hemispherical diffusion). For the relaxation of the concentration profile after an electrical perturbation (e.g., a potential step) Tj = L /D LD being - diffusion layer thickness in steady-state conditions. All these expressions can be derived from the qualitative estimate of the thickness of the nonstationary layer... 

Type of packing N e Radius of spheres inscribed in cavities Radius of circle inscribed in connecting throats... 

Radius of sphere having the same volume as the Earth, a = 6,371 km (equatorial radius = 6,378 km, polar radius = 6,357 km)... 

Extending the radius of sphere Or in formula (13.212) to infinity, r — 00, and taking into account conditions (13.202) - (13.204), which hold true for the tensors G pI and G as well, we find that... 

Equation (533) shows that the dispersion interaction potential energy is directly proportional to the radius of sphere, and it does not decay as 1 lr6, but as 1/D, which is much slower with the separation distance. On the other hand, if (D Sph)> then we can replace (D + x) by D in Equation (532), we then have... 

P = design internal pressure, psi P = allowable external pressure, psi Px = design external pressure, psi R = outside radius of spheres and hemispheres, crown radius of torispherical heads, in, t = thickness of cylinder, head or conical section, in. t, = equivalent thickness of cone, in. oc = half apex angle of cone, degrees... 

R,ii = mean radius of sphere, crown radius of F D, dished or ellipsoidal head, in. r, = outside radius of cylindrical attachment, in,... 

Wigner, E. P. and Breit, G., Approximation for Radius of Sphere Sufficient for Chain Reaction in Light Isotope , CF-3, January 9,1942. 

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