physically feasible
41Backup — For other uses of Backup , see Backup (disambiguation). In information technology, a backup or the process of backing up is making copies of data which may be used to restore the original after a data loss event. The verb form is back up in two… …
42Amateur sports — Amateurism (from Fr. amateur lover of, from O.Fr., from L. amatorem nom. amator , lover, ). As a value system, amateurism elevates things done with self interest above those done for pay ( i.e., professionalism). The term has particular currency… …
43Liquid breathing — Intervention MeSH D021061 Liquid breathing is a form of respiration in which a normally air breathing organism breathes an oxygen rich liquid (such as a perfluorocarb …
44Real estate appraisal — Real estate appraisal, property valuation or land valuation is the practice of developing an opinion of the value of real property, usually its Market Value. The need for appraisals arises from the heterogeneous nature of property as an… …
45Metro Balderas (song) — Metro Balderas , as it is generally known, or more precisely, Estación del metro Balderas ( Balderas subway station ), a song by Mexican Rock Musician Rodrigo González or Rockdrigo González, refers to a man looking for a woman who got lost in the …
46Fly system — Fly loft of the Theater Bielefeld in Germany A fly system, flying system or theatrical rigging system, is a system of lines (e.g. ropes), blocks (pulleys), counterweights and related devices within a theatre that enable a stage crew to quickly,… …
47Roman infantry tactics — refers to the theoretical and historical deployment, formation and maneuvers of the Roman infantry from the start of the Roman Republic to the fall of the Western Roman Empire. The article first presents a short overview of Roman training. Roman… …
48Bossi-Bonomi Pedaliante — The Pedaliante (Italian for Pedal Glider ) was a human powered aircraft designed and built by Enea Bossi and Vittorio Bonomi and disputably credited with, in 1936, performing the first fully human powered flight. The source of contention is that… …
49Crusades — a series of military expeditions between the 11th and 14th centuries, in which armies from the Christian countries of Europe tried to get back the Holy Land (= what is now Israel, Palestine, Jordan and Egypt) from the Muslims. The soldiers who… …
50ethics — /eth iks/, n.pl. 1. (used with a sing. or pl. v.) a system of moral principles: the ethics of a culture. 2. the rules of conduct recognized in respect to a particular class of human actions or a particular group, culture, etc.: medical ethics;… …
