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• Inorganic Chemistry
  Chemistry
  Materials Science
  Spintronics
  Energy and Resources
  Engineering and Construction
   
  

  Metal

  In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of ... > more
• Energy and the Environment
  Wind Energy
  Electricity
  Sustainability
  Water
  Nature of Water
   
  

  Water turbine

  A water turbine is a rotary engine that takes energy from moving water. Water turbines were developed in the nineteenth century and were widely used for industrial power prior to electrical grids. ... > more
• Energy and Resources
  Nanotechnology
  Sports Science
  Chemistry
  Inorganic Chemistry
  Textiles and Clothing
   
  

  Gold

  Gold is a chemical element in the periodic table that has the symbol Au and atomic number 79. A soft, shiny, yellow, dense, malleable, ductile transition metal, gold does not react with most ... > more
• Energy and the Environment
  Renewable Energy
  Physics
  Energy Technology
  Solar Energy
  Environmental Science
   
  

  Radiant energy

  Radiant energy is the energy of electromagnetic waves. The term is most commonly used in the fields of radiometry, solar energy, heating and lighting, but is also used less frequently in other fields ... > more
• Medical Technology
  Medical Devices
  Medical Imaging
  Nuclear Energy
  Brain Tumor
  Weapons Technology
   
  

  Positron emission tomography

  Positron emission tomography (PET) is a nuclear medicine medical imaging technique which produces a three dimensional image or map of functional processes in the body. PET is both a medical and ... > more
• Graphene
  Spintronics
  Materials Science
  Chemistry
  Sports Science
  Physics
   
  

  Germanium

  Germanium is a chemical element in the periodic table that has the symbol Ge and atomic number 32. This is a lustrous, hard, silver-white, metalloid that is chemically similar to tin. Germanium forms ... > 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
• Albert Einstein
  Black Holes
  Physics
  Quantum Physics
  Sports Science
  Asteroids, Comets and Meteors
   
  

  Gravitation

  Gravity is a force of attraction that acts between bodies that have mass. Gravity is the reason for the very existence of the earth, the sun and other celestial bodies; without it matter would not ... > more
• Automotive and Transportation
  Sports Science
  Transportation Science
  Vehicles
  Nature of Water
  Thermodynamics
   
  

  Tire

  A tire or tyre is a device covering the circumference of a wheel. It is an essential part of most ground vehicles and is used to dampen the oscillations caused by irregularities in the road surface, ... > more
• Energy and the Environment
  Solar Energy
  Renewable Energy
  Geomagnetic Storms
  Environmental Science
  Energy and Resources
   
  

  Solar cell

  A solar cell (or a "photovoltaic" cell) is a device that converts photons from the sun (solar light) into electricity. In general, a solar cell that includes both solar and nonsolar sources of light ... > more

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