a pair of cancels
1Electron pair — In chemistry, an electron pair consists of two electrons that occupy the same orbital but have opposite spins.Because electrons are fermions, the Pauli exclusion principle forbids these particles from having exactly the same quantum numbers.… …
2Problem of Apollonius — In Euclidean plane geometry, Apollonius problem is to construct circles that are tangent to three given circles in a plane (Figure 1); two circles are tangent if they touch at a single point. Apollonius of Perga (ca. 262 BC ndash; ca. 190 BC)… …
3Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… …
4Feynman diagram — The Wick s expansion of the integrand gives (among others) the following termNarpsi(x)gamma^mupsi(x)arpsi(x )gamma^ upsi(x )underline{A mu(x)A u(x )};,whereunderline{A mu(x)A u(x )}=int{d^4pover(2pi)^4}{ig {mu u}over k^2+i0}e^{ k(x x )}is the… …
5Monarch Airlines — IATA ZB ICAO MON Callsign MONARCH …
62008 in Irish music — This is a summary of the year 2008 in the Irish music industry. Summary January * On Wednesday January 9 the nominations for Irish Album of the Year 2007 were announced. [cite web|url=http://www.rte.ie/arts/2008/0110/choicemusicprize.html|title=… …
7Michael Schumacher — Schumacher at the 2011 Canadian Grand Prix Born 3 January 1969 (1969 01 03) (age 42) Hürth, West Germany …
8List of The Brady Bunch episodes — The Brady Bunch opening grid, season one The Brady Bunch is a situ …
9Law & Order — Title card Format Police procedural Legal drama …
10chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …
