Matter & Energy Articles

• Alternative Fuels
  Astrophysics
  Fuel Cells
  Organic Chemistry
  Energy and Resources
  Galaxies
   
  

  Hydrogen

  Hydrogen is a chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, nonmetallic, univalent, tasteless, ... > more
• Electricity
  Solar Energy
  Textiles and Clothing
  Energy Technology
  Energy and Resources
  Wind Energy
   
  

  Electricity generation

  Electricity generation is the first process in the delivery of electricity to consumers. The other three processes are electric power transmission, electricity distribution and electricity retailing. ... > more
• Engineering and Construction
  Engineering
  Civil Engineering
  Materials Science
  Energy Technology
  Technology
   

  Metallurgy

  Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements and their mixtures, which are called ... > more
• Physics
  Quantum Physics
  Spintronics
  Quantum Computing
  Black Holes
  Graphene
   
  

  Quantum number

  A quantum number describes the energies of electrons in atoms. Each quantum number specifies the value of a conserved quantity in the dynamics of the quantum system. Since any quantum system can have ... > more
• Solar Energy
  Energy Technology
  Energy and Resources
  Thermodynamics
  Electricity
  Wind Energy
   
  

  Geothermal power

  Geothermal power is the use of geothermal heat for electricity generation. It is often referred to as a form of renewable energy, but because the heat at any location can eventually be depleted it ... > more
• Automotive and Transportation
  Alternative Fuels
  Fossil Fuels
  Fuel Cells
  Energy and Resources
  Energy and the Environment
   
  

  Flexible-fuel vehicle

  A flexible-fuel vehicle (FFV) or dual-fuel vehicle (also sometimes called only flex-fuel) is an automobile that can typically alternate between two sources of fuel. A common example is a vehicle that ... > more
• Nanotechnology
  Healthy Aging
  Attention Deficit Disorder
  Engineering
  Sports Science
  Sports Medicine
   

  Nanorobotics

  Nanorobotics is the technology of creating machines or robots at or close to the scale of a nanometre (10-9 metres). More specifically, nanorobotics refers to the still largely theoretical ... > more
• Alternative Fuels
  Fossil Fuels
  Energy and Resources
  Fuel Cells
  Energy and the Environment
  Petroleum
   
  

  Common ethanol fuel mixtures

  Ethanol (ethyl alcohol) and methanol (methyl alcohol) are two types of alcohol fuels. The use of pure alcohols in internal combustion engines is only possible if the engine is designed or modified ... > 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
• Organic Chemistry
  Graphene
  Electronics
  Nanotechnology
  Chemistry
  Fossil Fuels
   
  

  Carbon-14

  Carbon-14, 14C, or radiocarbon, is a radioactive isotope of carbon discovered on February 27, 1940, by Martin Kamen and Sam Ruben. Its nucleus contains 6 protons and 8 neutrons. Its presence in ... > more

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