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• Chemistry
  Inorganic Chemistry
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  Argon

  Argon is a chemical element in the periodic table. It has the symbol Ar and atomic number 18. The third noble gas, in group 18, argon makes up about 1% of the Earth's atmosphere, making it the most ... > more
• Nature of Water
  Sports Science
  Chemistry
  Fuel Cells
  Physics
  Inorganic Chemistry
   
  

  Kelvin

  The kelvin (symbol: K) is the SI unit of temperature. It is defined as the fraction 1/273.16 of the thermodynamic (absolute) temperature of the triple point of ... > more
• Albert Einstein
  Black Holes
  Physics
  Quantum Physics
  Cosmology
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  General relativity

  General relativity (GR) is the geometrical theory of gravitation published by Albert Einstein in 1915. It unifies special relativity and Sir Isaac Newton's law of universal gravitation with the ... > more
• Materials Science
  Inorganic Chemistry
  Chemistry
  Sports Science
  Electronics
  Nature of Water
   
  

  Polyethylene

  Polyethylene, (IUPAC name polyethene), is a thermoplastic commodity heavily used in consumer products (over 60 million tons are produced worldwide every year). It is a polymer consisting of long ... > more
• Stars
  Astrophysics
  Astronomy
  Sun
  Extrasolar Planets
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  Luminosity

  In general physics, luminosity (more properly called luminance) is the density of luminous intensity in a given ... > 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
• Graphene
  Sports Science
  Materials Science
  Biochemistry
  Chemistry
  Physics
   
  

  Crystal structure

  In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; ... > more
• Volcanoes
  Nature of Water
  Sports Science
  Natural Disasters
  Quantum Physics
  Tsunamis
   
  

  Pumice

  Pumice is a highly vesicular pyroclastic igneous rock of intermediate to siliceous magmas including rhyolite, trachyte and phonolite. Pumice is usually light in colour ranging from white, yellowish, ... > more
• Detectors
  Healthy Aging
  Attention Deficit Disorder
  Sports Science
  Sports Medicine
  Nature of Water
   
  

  Radon

  Radon is a chemical element in the periodic table that has the symbol Rn and atomic number 86. A radioactive noble gas that is formed by the disintegration of radium, radon is one of the heaviest ... > more
• Inorganic Chemistry
  Chemistry
  Weapons Technology
  Nature of Water
  Spintronics
  Sports Science
   

  Noble gas

  The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they ... > more

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