Matter & Energy Articles

• Geology
  Nature of Water
  Sports Science
  Atmosphere
  Floods
  Water
   
  

  Sedimentary rock

  Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as ... > more
• Aviation
  Vehicles
  Fuel Cells
  Fossil Fuels
  Quantum Physics
  Sports Science
   
  

  Jet engine

  A jet engine is any engine that accelerates and discharges a fast moving jet of fluid to generate thrust in accordance with Newton's third law of ... > more
• Earthquakes
  Natural Disasters
  Tsunamis
  Construction
  Sports Science
  Physics
   

  Richter magnitude scale

  The Richter magnitude test scale (or more correctly local magnitude ML scale) assigns a single number to quantify the size of an earthquake. It is a base-10 logarithmic scale obtained by calculating ... > more
• Cosmic Rays
  Black Holes
  Detectors
  Space Telescopes
  Medical Technology
  Medical Imaging
   
  

  X-ray

  X-rays are a form of electromagnetic radiation with a wavelength in the range of 10 to 0.1 nanometers, corresponding to frequencies in the range 30 to 3000 PHz. X-rays are primarily used 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
• Sports Science
  Chemistry
  Inorganic Chemistry
  Organic Chemistry
  Nature of Water
  Spintronics
   
  

  Vanadium

  Vanadium is a chemical element in the periodic table that has the symbol V and atomic number 23. A rare, soft and ductile element, vanadium is found combined in certain minerals and is used mainly to ... > more
• Graphene
  Nature of Water
  Sports Science
  Physics
  Chemistry
  Spintronics
   
  

  Indium

  Indium is a chemical element in the periodic table that has the symbol In and atomic number 49. This rare, soft, malleable and easily fusible poor metal, is chemically similar to aluminium or gallium ... > more
• Graphene
  Chemistry
  Inorganic Chemistry
  Sports Science
  Physics
  Nature of Water
   
  

  Gallium

  Gallium is a chemical element in the periodic table that has the symbol Ga and atomic number 31. A rare, soft silvery metallic poor metal, gallium is a brittle solid at low temperatures but liquefies ... > more
• Sports Science
  Sports Medicine
  Healthy Aging
  Attention Deficit Disorder
  Pregnancy and Childbirth
  Workplace Health
   
  

  Leonardo da Vinci

  Leonardo da Vinci (born April 15, 1452 in Vinci, Italy, and died on May 2, 1519 in Cloux, France) was an Italian Renaissance architect, musician, anatomist, inventor, engineer, sculptor, geometer, ... > more
• Soil Types
  Sports Science
  Nature of Water
  Inorganic Chemistry
  Chemistry
  Physics
   
  

  Potassium

  Potassium is a chemical element in the periodic table. It has the symbol K and atomic number 19. The name "potassium" comes from the word "potash", as potassium was first isolated from potash. ... > more

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