hot air radiation heating system
81Carbon offset — Part of a series on Green economics Concepts …
82Thermocline — Aquatic layers Pelagic    Photic       Epipelagic …
83Crower six stroke — The Crower six stroke engine is a concept under development by Bruce Crower. Two extra strokes are added to the customary internal combustion engine four stroke Otto cycle, which makes a six stroke engine. A third down stroke is a steam stroke… …
84Radiator — A room heat delivery (or exchanger) component of a hydronic (hot water or steam) heating system; hot water or steam is delivered to it by natural convection or by a pump from a boiler. *** A heating unit usually exposed to view within the… …
85TARDIS — The TARDIS used from 2005 to 2010 on display at BBC Television Centre …
86climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …
87Solar thermal energy — Solar thermal system for water heating in Santorini, Greece …
88Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
89Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …
90steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
