Matter & Energy Articles

• Sports Science
  Ancient Civilizations
  Construction
  Civil Engineering
  Vehicles
  Aviation
   
  

  Crane (machine)

  A crane is a tower or derrick equipped with cables and pulleys that can be used both to lift and lower materials and to shift them horizontally. Cranes are commonly employed in the construction ... > more
• Healthy Aging
  Sports Science
  Sports Medicine
  Attention Deficit Disorder
  Mathematics
  Physics
   
  

  Scientific method

  Scientific method is a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. It is based on gathering observable, empirical and ... > more
• Ultrasound
  Medical Imaging
  Medical Technology
  Pregnancy and Childbirth
  Sports Science
  Detectors
   
  

  Ultrasound

  Ultrasound is sound with a frequency greater than the upper limit of human hearing, approximately 20 kilohertz (20,000 hertz). Some animals, such as dogs, dolphins, bats, and mice have an upper limit ... > more
• Spintronics
  Sports Science
  Sports Medicine
  Physics
  Materials Science
  Graphene
   
  

  Scanning electron microscope

  The scanning electron microscope (SEM) is a type of electron microscope capable of producing high resolution images of a sample surface. Due to the manner in which the image is created, SEM images ... > more
• Sports Science
  Transportation Science
  Vehicles
  Construction
  Quantum Physics
  Civil Engineering
   
  

  Bicycle

  A bicycle, pushbike, or bike, is a pedal-driven land vehicle with two wheels attached to a frame, one behind the other. First introduced in 19th-century Europe, bicycles evolved quickly into their ... > more
• Electricity
  Energy Technology
  Solar Energy
  Batteries
  Wind Energy
  Sports Science
   
  

  Three-phase electric power

  Three-phase is a common method of electric power transmission. It is a type of polyphase system used to power motors and many other devices. Three phase has properties that make it very desirable in ... > more
• Air Pollution
  Air Quality
  Pollution
  Environmental Science
  Environmental Issues
  Sports Science
   
  

  Smog

  Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke ... > more
• Sports Science
  Chemistry
  Inorganic Chemistry
  Physics
  Materials Science
  Spintronics
   
  

  Thallium

  Thallium is the chemical element in the periodic table that has the symbol Tl and atomic number 81. This soft gray malleable poor metal resembles tin but discolors when exposed to air. Thallium is ... > more
• Nature of Water
  Chemistry
  Inorganic Chemistry
  Physics
  Quantum Physics
  Sports Science
   
  

  Fluid mechanics

  Fluid mechanics is the subdiscipline of continuum mechanics that studies fluids, that is, liquids and gases. It can be further subdivided into fluid statics, the study of fluids at rest, and fluid ... > more
• Hazardous Waste
  Sports Science
  Healthy Aging
  Sports Medicine
  Environmental Policy
  Air Pollution
   
  

  Dioxin

  Dioxin is the popular name for the family of chlorinated organic compounds comprising of Polychlorinated Dibenzo Furans (PCDF) and Polychlorinated Dibenzo Dioxins (PCDD). PCDD/F's have been shown to ... > more

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