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• Robotics
  Robotics Research
  Artificial Intelligence
  Engineering
  Sports Science
  Vehicles
   
  

  Robot

  A robot is a mechanical or virtual, artificial agent. It is usually an electromechanical system, which, by its appearance or movements, conveys a sense that it has intent or agency of its own. The ... > more
• Nature of Water
  Sports Science
  Chemistry
  Inorganic Chemistry
  Albert Einstein
  Wind Energy
   
  

  Drag (physics)

  For a solid object moving through a fluid or gas, drag is the sum of all the aerodynamic or hydrodynamic forces in the direction of the external fluid flow. It therefore acts to oppose the motion of ... > more
• Energy and the Environment
  Petroleum
  Renewable Energy
  Environmental Science
  Oil Spills
  Fossil Fuels
   
  

  Biodiesel

  Biodiesel refers to a diesel-equivalent, processed fuel derived from biological sources. Though derived from biological sources, it is a processed fuel that can be readily used in diesel-engined ... > more
• Sports Science
  Weapons Technology
  Vehicles
  Electricity
  Nuclear Energy
  Batteries
   
  

  Submarine

  A submarine is a specialized watercraft that can operate underwater. Most major navies use submarines. Submarines are also used for marine and freshwater science and for work at depths too great for ... > more
• Ancient Civilizations
  Weapons Technology
  Sports Science
  Archaeology
  Anthropology
  Aviation
   
  

  Catapult

  Catapults are siege engines using an arm to hurl a projectile a great distance. Any machine that hurls an object can be considered a catapult, but the term is generally understood to mean medieval ... > more
• Alternative Fuels
  Fossil Fuels
  Fuel Cells
  Energy and the Environment
  Petroleum
  Renewable Energy
   
  

  Common ethanol fuel mixtures

  Ethanol (ethyl alcohol) and methanol (methyl alcohol) are two types of alcohol fuels. The use of pure alcohols in internal combustion engines is only possible if the engine is designed or modified ... > more
• Medical Technology
  Sports Science
  Technology
  Optics
  Physics
  Aviation
   
  

  Radio

  Radio waves are a form of electromagnetic radiation, created whenever a charged object (in normal radio transmission, an electron) accelerates with a frequency that lies in the radio frequency (RF) ... > more
• Alternative Fuels
  Graphene
  Spintronics
  Global Warming
  Attention Deficit Disorder
  Healthy Aging
   
  

  Nitrous oxide

  Nitrous oxide, also known as dinitrogen oxide or dinitrogen monoxide, is a chemical compound with chemical formula N2O. It is commonly known as laughing gas due to the exhilarating effects of ... > more
• Energy and the Environment
  Renewable Energy
  Electricity
  Solar Energy
  Wind Energy
  Energy Technology
   
  

  Power station

  A power station or power plant is a facility for the generation of electric power. At the centre of nearly all power stations is a generator, a rotating machine that converts mechanical energy into ... > more
• Aviation
  Sports Science
  Vehicles
  Energy Policy
  Construction
  Transportation Science
   
  

  Airbus A380

  The Airbus A380 is a double-deck, four-engined airliner manufactured by EADS (Airbus S.A.S.) It first flew on April 27, 2005 from Toulouse in France. Commercial flights are scheduled to begin in 2007 ... > more

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