Biometric Articles

• Cholesterol
  Heart Disease
  Triglycerides
  Diet and Weight Loss
  Vegetarian
  Diseases and Conditions
   
  

  Cholesterol

  Cholesterol is a sterol and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. Cholesterol plays a central role in many biochemical ... > more
• Aviation
  Atmosphere
  Sports Science
  Aerospace
  Global Warming
  Vehicles
   

  Altitude

  Altitude is the elevation of an object from a known level or datum. Common datums are mean sea level and the surface of the WGS-84 geoid, used by GPS. In the United States and the UK aviation ... > more
• Sports Science
  Automotive and Transportation
  Weapons Technology
  Vehicles
  Nuclear Energy
  Electricity
   
  

  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
• Alternative Fuels
  Energy and the Environment
  Energy and Resources
  Renewable Energy
  Fuel Cells
  Energy Technology
   
  

  Ethanol fuel

  The use of ethanol as a fuel for internal combustion engines, either alone or in combination with other fuels, has been given much attention mostly because of its possible environmental and long-term ... > more
• Aviation
  Vehicles
  Aerospace
  Sports Science
  Automotive and Transportation
  Engineering and Construction
   
  

  Wright brothers

  The Wright Brothers, Orville Wright (August 19, 1871 - January 30, 1948) and Wilbur Wright (April 16, 1867 - May 30, 1912), are generally credited with the design and construction of the practical ... > more
• Sports Science
  Chemistry
  Inorganic Chemistry
  Weapons Technology
  Physics
  Batteries
   
  

  Beryllium

  Beryllium is the chemical element in the periodic table that has the symbol Be and atomic number 4. A toxic bivalent element, beryllium is a steel grey, strong, light-weight yet brittle, alkaline ... > more
• Aviation
  Automotive and Transportation
  Sports Science
  Vehicles
  Weapons Technology
  Aerospace
   
  

  Cruise missile

  A cruise missile is a guided missile which uses a lifting wing and most often a jet propulsion system to allow sustained flight. Cruise missiles are, in essence, unmanned aircraft. They are generally ... > more
• Triglycerides
  Cholesterol
  Nutrition
  Obesity
  Diet and Weight Loss
  Fitness
   
  

  Trans fat

  Trans fatty acids (commonly termed trans fats) are a type of unsaturated fat (and may be monounsaturated or polyunsaturated). Trans fats occur naturally, in small quantities, in meat and dairy ... > more
• Physics
  Quantum Physics
  Optics
  Sports Science
  Energy Technology
  Spintronics
   
  

  Photoelectric effect

  The photoelectric effect is the emission of electrons from matter upon the absorption of electromagnetic radiation, such as ultraviolet radiation or x-rays. Upon exposing a metallic surface to ... > more
• Air Quality
  Fossil Fuels
  Thermodynamics
  Air Pollution
  Energy and Resources
  Energy and the Environment
   
  

  Combustion

  Combustion or burning is a complex sequence of chemical reactions between a fuel and an oxidant accompanied by the production of heat or both heat and light in the form of either a glow or flames. ... > more

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