surface hole
41Michael Hole — Occupation Jockey Born March 29, 1941 Canterbury, England Died April 22, 1976 Career wins 2042 Major racing wins, hon …
42black hole — Astron. a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape. * * * Cosmic… …
43Black Hole — 1. Also called Black Hole of Calcutta. a small prison cell in Fort William, Calcutta, in which, in 1756, Indians are said to have imprisoned 146 Europeans, only 23 of whom were alive the following morning. 2. (l.c.) any usually wretched place of… …
44Timeline of black hole physics — Timeline of black hole physics* 1640 Ismael Bullialdus suggests an inverse square gravitational force law * 1684 Isaac Newton writes down his inverse square Law of universal gravitation * 1758 Rudjer Josip Boscovich develops his Theory of forces …
45Glory hole (mining) — A glory hole is an informal term for a large and impressive mine excavation open to the surface. The term can mean any one of a number of things:* A deep mine shaft.* An open pit mine. * In the block caving method of underground mining, ore… …
46Noon's Hole — (Sumera) – Arch Cave The stream pours over the edge as a caver rigs the first pitch of Noon s Hole Location Killydrum Road, Old Barr (Barrs) Knockmore Mountain Nr. Boho Co …
47Black hole information paradox — The black hole information paradox results from the combination of quantum mechanics and general relativity. It suggests that physical information could disappear in a black hole. It is a contentious subject since it violates a commonly assumed… …
48Jackson Hole Airport — Infobox Airport name = Jackson Hole Airport IATA = JAC ICAO = KJAC FAA = JAC type = Public owner = Jackson Hole Airport Board operator = city served = Jackson, Wyoming location = elevation f = 6,451 elevation m = 1,966 website =… …
49Sonic black hole — A sonic black hole (sometimes called a dumb hole) is a phenomenon in which phonons (sound perturbations) are unable to escape from a fluid that is flowing more quickly than the local speed of sound. They are called sonic, or acoustic, black holes …
50Blue Hole (Red Sea) — Blue Hole is a diving location on east Sinai, a few kilometres north of Dahab, Egypt on the coast of the Red Sea.The Blue Hole is a submarine pothole (a kind of cave), around 130m deep. There is a shallow opening around 6m deep, opening out to… …
