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• Alternative Fuels
  Astrophysics
  Fuel Cells
  Organic Chemistry
  Galaxies
  Chemistry
   
  

  Hydrogen

  Hydrogen is a chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, nonmetallic, univalent, tasteless, ... > more
• Wildfires
  Natural Disasters
  Earthquakes
  Construction
  Civil Engineering
  Oil Spills
   
  

  Firestorm

  A firestorm is a conflagration which attains such intensity that it creates and sustains its own wind system. A firestorm is created as a result of the "chimney effect" as the heat of the original ... > more
• Sports Science
  Aviation
  Vehicles
  Energy Policy
  Construction
  Optics
   
  

  Parachuting

  Parachuting, or skydiving, is an activity involving the breaking of a free-fall from a height using a parachute. Today it is performed as a recreational activity and a competitive sport, as well as ... > more
• Weapons Technology
  Nuclear Energy
  Chemistry
  Physics
  Inorganic Chemistry
  Organic Chemistry
   

  Isotope

  Isotopes are forms of an element whose nuclei have the same atomic number–-the number of protons in the nucleus--but different mass numbers because they contain different numbers of ... > more
• Energy and the Environment
  Renewable Energy
  Environmental Science
  Energy Technology
  Sustainability
  Solar Energy
   
  

  Renewable energy

  Renewable energy (sources) or RES capture their energy from existing flows of energy, from on-going natural processes, such as sunshine, wind, flowing water, biological processes, and geothermal heat ... > more
• Geomagnetic Storms
  Sun
  Solar Flare
  Renewable Energy
  Energy and the Environment
  Wind Energy
   
  

  Solar wind

  A solar wind is a stream of charged particles (i.e., a plasma) which are ejected from the upper atmosphere of a star. When originating from stars other than the Earth's Sun, it is sometimes called a ... > more
• Nature of Water
  Inorganic Chemistry
  Chemistry
  Sports Science
  Physics
  Thermodynamics
   
  

  Friction

  Friction is the force that opposes the relative motion or tendency of such motion of two surfaces in contact. It is also the contact of two objects creating static electricity. It is not, however, a ... > more
• Civil Engineering
  Construction
  Engineering
  Sports Science
  Energy Technology
  Weapons Technology
   
  

  Construction

  In project architecture and civil engineering, construction is the building or assembly of any infrastructure on a site or sites. Although this may be thought of as a single activity, in fact ... > more
• Organic Chemistry
  Inorganic Chemistry
  Chemistry
  Sports Science
  Graphene
  Alternative Fuels
   
  

  Redox

  Redox reactions include all chemical processes in which atoms have their oxidation number (oxidation state) changed. Substances that have the ability to oxidize other substances are said to be ... > more
• Spintronics
  Sports Science
  Physics
  Energy Technology
  Solar Energy
  Electricity
   
  

  Torque

  In physics, torque can informally be thought of as "rotational force" or "angular force" which causes a change in rotational motion. This force is defined by linear force multiplied by a radius. The ... > more

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