An Unkindness of Ravens An Unkindness of Ravens An Unkindness of Ravens is a novel by British crime-writer Ruth Rendell. It was first published in 1985, and features her popular protagonist Inspector Wexford, and is the 13th entry in the series. On American publication, it was shortlisted for the MWA Edgar Award, alongside another Rendell novel, "The Tree of Hands", meaning she has the remarkable distinction of being one of only two authors in the award's history to have had "two" novels on the shortlist in any one year (the other being Charlotte Armstrong). "Ravens" was adapted as a play by theatre professor Joel
Specific energy Specific energy Specific energy is energy per unit mass. (It is also sometimes called "energy density," though "energy density" more precisely means energy per unit volume.) It is used to quantify, for example, stored heat and other thermodynamic properties of substances such as specific internal energy, specific enthalpy, specific Gibbs free energy, and specific Helmholtz free energy. It may also be used for the kinetic energy or potential energy of a body. Specific energy is an intensive property, whereas energy and mass are extensive properties. The SI unit for specific energy is the joule per kilogram (J/kg). Other units still