Matter & Energy Articles

• Weapons Technology
  Nuclear Energy
  Renewable Energy
  Energy and the Environment
  Physics
  Environmental Science
   
  

  Effects of nuclear explosions

  A nuclear explosion occurs as a result of the rapid release of energy from an uncontrolled nuclear reaction. The driving reaction may be nuclear fission, nuclear fusion or a multistage cascading ... > more
• Robotics
  Artificial Intelligence
  Robotics Research
  Engineering
  Sports Science
  Detectors
   
  

  Humanoid robot

  A humanoid robot is a robot with its overall appearance based on that of the human body. In general humanoid robots have a torso with a head, two arms and two legs, although some forms of humanoid ... > more
• Transportation Science
  Automotive and Transportation
  Healthy Aging
  Vehicles
  Workplace Health
  Sports Medicine
   

  Road-traffic safety

  Road-traffic safety aims to reduce the harm (deaths, injuries, and property damage) resulting from crashes of road vehicles traveling on public roads. Harm from road-traffic crashes is greater than ... > more
• Hazardous Waste
  Sports Science
  Chemistry
  Organic Chemistry
  Textiles and Clothing
  Construction
   
  

  Arsenic

  Arsenic is a chemical element in the periodic table that has the symbol As and atomic number 33. This is a notoriously poisonous metalloid that has three allotropic forms; yellow, black and grey. ... > more
• Organic Chemistry
  Biochemistry
  Chemistry
  Sports Science
  Inorganic Chemistry
  Nature of Water
   
  

  Hydrochloric acid

  The chemical substance hydrochloric acid is the aqueous (water-based) solution of hydrogen chloride (HCl) gas. It is a strong acid, the major component of gastric acid and of wide industrial use. As ... > more
• Spintronics
  Sports Science
  Physics
  Energy Technology
  Solar Energy
  Optics
   
  

  Torque

  In physics, torque can informally be thought of as "rotational force" or "angular force" which causes a change in rotational motion. This force is defined by linear force multiplied by a radius. The ... > more
• Energy Technology
  Energy and Resources
  Sports Science
  Electricity
  Electronics
  Consumer Electronics
   
  

  Capacitor

  A capacitor is an electrical device that can store energy in the electric field between a pair of closely spaced conductors (called 'plates'). When voltage is applied to the capacitor, electric ... > more
• Sports Science
  Vehicles
  Aviation
  Space Probes
  Space Exploration
  Space Station
   
  

  Model rocket

  Model rocketry is a hobby similar to building model airplanes. In the hobby today, there are two distinct areas of rocket activity: amateur (or experimental) rocketry, and model rocketry (including ... > more
• Nature of Water
  Physics
  Quantum Physics
  Inorganic Chemistry
  Albert Einstein
  Graphene
   
  

  Liquid

  A liquid is one of the three ordinary phases of matter. It is a fluid whose shape is usually determined by the container it fills. Its volume is fixed under conditions of constant temperature and ... > more
• Quantum Physics
  Physics
  Sports Science
  Spintronics
  Black Holes
  Cosmic Rays
   
  

  Quark

  Quarks are one of the two basic constituents of matter in the Standard Model of particle physics. (The others are leptons.) Antiparticles of quarks are called antiquarks. Quarks and antiquarks are ... > more

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