geometric factor (Kg) A numerical multiplier defined by the geometrical spacings between electrodes, which is used in conjunction with the voltage-to-current (R) ratio measured in electrical resistivity surveys to give an apparent resistivity (ρa) such that ρa = Kg × R. The generalized formula for calculating Kg for a four-electrode configuration is: Kg = 2π(1/C1P1 − 1/C1P2 − 1/C2P1 + 1/C2P2)−1 where C1 and C2, and P1 and P2 are the current and potential electrode positions respectively. The geometric factor for the three main electrode configurations are: dipole—dipole, Kg = πn(n + 1)(n + 2)p; Schlumberger, Kg = (πp2/q)(1 − q2/4p2); Wenner, Kg = 2πp, where p and q are defined for each case.
More From encyclopedia.com
standpipe , standpipe •gripe, hype, mistype, pipe, ripe, sipe, slype, snipe, stripe, swipe, tripe, type, wipe •guttersnipe • bagpipe • standpipe •tailpipe • drai… P , P, p [Called ‘pee’]. The 16th LETTER of the Roman ALPHABET as used for English. It originated in the Phoenician symbol pe, which was adopted by the G… pawpaw , paw·paw / ˈpôpô/ (also papaw / pəˈpô; ˈpôpô/ ) • n. 1. another term for papaya. 2. (also pawpaw tree) a North American tree (Asimina triloba) of the… pauper , pau·per / ˈpôpər/ • n. a very poor person. ∎ hist. a recipient of government relief or public charity. DERIVATIVES: pau·per·dom / -dəm/ n. pau·per·is… Decibel , decibel •Adele, Aix-la-Chapelle, aquarelle, artel, au naturel, bagatelle, béchamel, befell, bell, belle, boatel, Brunel, Cadell, carousel, cartel, ce… Pipe , pipe / pīp/ • n. 1. a tube of metal, plastic, or other material used to convey water, gas, oil, or other fluid substances. ∎ a cylindrical vein of or…
About this article
Updated About encyclopedia.com content Print Article
Geologist Richard Oldham's 1906 Paper on Seismic Wave Transmission Establishes the Existence of Earth's Core and Demonstrates the Value of Seismology for Studying the Structure of Earth's Deep Interior