Matter & Energy Articles

• Chemistry
  Organic Chemistry
  Inorganic Chemistry
  Graphene
  Biochemistry
  Thermodynamics
   
  

  Organic chemistry

  Organic chemistry is the scientific study of the structure, properties, composition, reactions, and synthesis of organic compounds that by definition contain carbon. It is a specific discipline ... > more
• Engineering
  Civil Engineering
  Engineering and Construction
  Energy Technology
  Textiles and Clothing
  Thermodynamics
   
  

  Machine

  A machine is any mechanical or organic device that transmits or modifies energy to perform or assist in the performance of tasks. It normally requires some energy source and accomplishes some sort of ... > more
• Energy and the Environment
  Energy and Resources
  Petroleum
  Fossil Fuels
  Renewable Energy
  Energy Policy
   
  

  Fossil fuel

  Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. In common dialogue, the term fossil fuel also includes ... > more
• Healthy Aging
  Attention Deficit Disorder
  Organic Chemistry
  Chemistry
  Inorganic Chemistry
  Sports Science
   
  

  Catalysis

  In chemistry and biology, catalysis is the acceleration (increase in rate) of a chemical reaction by means of a substance, called a catalyst, that is itself not consumed by the overall reaction. A ... > more
• Chemistry
  Inorganic Chemistry
  Physics
  Organic Chemistry
  Materials Science
  Biochemistry
   

  Chemical bond

  A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic ... > more
• Alternative Fuels
  Energy and the Environment
  Energy and Resources
  Renewable Energy
  Fuel Cells
  Energy Technology
   
  

  Ethanol fuel

  The use of ethanol as a fuel for internal combustion engines, either alone or in combination with other fuels, has been given much attention mostly because of its possible environmental and long-term ... > more
• Medical Technology
  Chemistry
  Inorganic Chemistry
  Sports Science
  Organic Chemistry
  Physics
   
  

  Resonance (chemistry)

  Resonance in chemistry is a tool used (predominately in organic chemistry) to represent certain types of molecular structures. Resonance is a key component of valence bond theory and arises when no ... > more
• Chemistry
  Inorganic Chemistry
  Organic Chemistry
  Physics
  Materials Science
  Biochemistry
   
  

  Molecule

  In general, a molecule is the smallest particle of a pure chemical substance that still retains its composition and chemical properties. In chemistry and molecular sciences, a molecule is a ... > more
• Energy and the Environment
  Renewable Energy
  Environmental Science
  Energy Technology
  Sustainability
  Solar Energy
   
  

  Renewable energy

  Renewable energy (sources) or RES capture their energy from existing flows of energy, from on-going natural processes, such as sunshine, wind, flowing water, biological processes, and geothermal heat ... > more
• Energy and the Environment
  Renewable Energy
  Electricity
  Solar Energy
  Wind Energy
  Energy Technology
   
  

  Power station

  A power station or power plant is a facility for the generation of electric power. At the centre of nearly all power stations is a generator, a rotating machine that converts mechanical energy into ... > more

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