Physics Articles

• Air Pollution
  Acid Rain
  Geochemistry
  Organic Chemistry
  Air Quality
  Healthy Aging
   

  Nitrogen oxide

  NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the oxygen in the air to produce ozone, which is also ... > more
• Aviation
  Vehicles
  Fuel Cells
  Fossil Fuels
  Petroleum
  Alternative Fuels
   
  

  Internal combustion engine

  The internal combustion engine is a heat engine in which combustion occurs in a confined space called a combustion chamber. Combustion of a fuel creates high temperature/pressure gases, which are ... > more
• Dietary Supplement
  Cell Biology
  Genetics
  Molecular Biology
  Organic Chemistry
  Biochemistry
   
  

  Amino acid

  In chemistry, an amino acid is a molecule that contains both amine and carboxyl functional groups. In biochemistry, this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R ... > more
• Ozone Holes
  Air Quality
  Air Pollution
  Environmental Issues
  Pollution
  Atmosphere
   
  

  Tropospheric ozone

  Ozone (O3) is a key constituent of the troposphere. Photochemical and chemical reactions involving it drive many of the chemical processes that occur in the atmosphere by day and by night. At ... > more
• Construction
  Sports Science
  Nature of Water
  Civil Engineering
  Materials Science
  Organic Chemistry
   
  

  Concrete

  In construction, concrete is a composite building material made from the combination of aggregate and cement ... > more
• Sports Science
  Ancient Civilizations
  Fossils
  Solar Flare
  Technology
  Sun
   
  

  Antikythera mechanism

  The Antikythera mechanism is an ancient mechanical analog computer (as opposed to digital computer) designed to calculate astronomical positions. It was discovered in the Antikythera wreck off the ... > more
• Water
  Nature of Water
  Drought Research
  Environmental Issues
  Ecosystems
  Pollution
   
  

  Water

  Water is a tasteless, odorless, and nearly colorless (it has a slight hint of blue) substance in its pure form that is essential to all known forms of life and is known also as the most universal ... > more
• Tsunamis
  Natural Disasters
  Albert Einstein
  Quantum Physics
  Earthquakes
  Optics
   
  

  Seismic wave

  A seismic wave is a wave that travels through the Earth, most often as the result of a tectonic earthquake, sometimes from an explosion. There are two types of seismic wave, namely, 'body wave' and ... > 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
• Organic Chemistry
  Biochemistry
  Heartburn
  Vitamin C
  Nutrition
  Gastrointestinal Problems
   
  

  Citric acid

  Citric acid is a weak organic acid found in citrus fruits. It is a natural preservative and is also used to add an acidic (sour) taste to foods and soft drinks. In biochemistry, it is important as ... > more

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