hydrogen cycle
91Water — This article is about general aspects of water. For a detailed discussion of its properties, see Properties of water. For other uses, see Water (disambiguation) …
92Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …
93Thermal power station — Republika Power Plant, a thermal power station in Pernik, Bulgaria …
94Glossary of fuel cell terms — The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but …
95climate — /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… …
96Ammonia — For other uses, see Ammonia (disambiguation). Ammonia …
97Sulfuric acid — Sulfuric acid …
98Airbreathing jet engine — An airbreathing jet engine (or ducted jet engine) is a jet engine propelled by a jet of hot exhaust gases formed from air that is drawn into the engine via an inlet duct. All practical airbreathing jet engines are internal combustion engines that …
99Photosynthesis — Composite image showing the global distribution of photosynthesis, including both oceanic phytoplankton and vegetation …
100Reaction Engines SABRE — infobox rocket engine imsize=220 caption=A model of the SABRE name=Reaction Engines SABRE country of origin=UK status=R D type=liquid fuel=Liquid hydrogen oxidiser=LOX cycle=combined cycle precooled jet engine + closed cycle rocket engine… …
