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• Acid Rain
  Pollution
  Air Pollution
  Organic Chemistry
  Biochemistry
  Environmental Issues
   
  

  Acid

  An acid (often represented by the generic formula HA) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a pH of less than 7.0. That approximates ... > more
• Cosmic Rays
  Black Holes
  Space Telescopes
  Medical Technology
  Physics
  Optics
   
  

  Gamma ray

  Gamma rays are an energetic form of electromagnetic radiation produced by radioactive decay or other nuclear or subatomic processes such as electron-positron annihilation. Gamma rays form the ... > more
• Ozone Holes
  Chemistry
  Air Quality
  Environmental Issues
  Sports Science
  Inorganic Chemistry
   
  

  Haloalkane

  The haloalkanes (also known as Halogenoalkanes) are a group of chemical compounds, consisting of alkanes, such as methane or ethane, with one or more halogens linked, such as chlorine or fluorine, ... > more
• Ozone Holes
  Environmental Issues
  Air Quality
  Air Pollution
  Pollution
  Atmosphere
   
  

  Ozone

  Ozone (O3) is an allotrope of oxygen, the molecule consisting of three oxygen atoms instead of the more stable diatomic O2. Ozone is a powerful oxidizing agent. It is present in low concentrations ... > more
• Biochemistry
  Sports Science
  Organic Chemistry
  Physics
  Detectors
  Aviation
   
  

  Mass spectrometry

  Mass spectrometry is an analytical technique used to measure the mass-to-charge ratio of ions. It is most generally used to find the composition of a physical sample by generating a mass spectrum ... > more
• Nature of Water
  Wind Energy
  Sports Science
  Physics
  Quantum Physics
  Chemistry
   
  

  Turbulence

  In fluid dynamics, turbulence or turbulent flow is a flow regime characterized by chaotic, stochastic property changes. This includes low momentum diffusion, high momentum convection, and rapid ... > more
• Acoustics
  Nature of Water
  Optics
  Sports Science
  Thermodynamics
  Physics
   
  

  Speed of sound

  The speed of sound is a term used to describe the speed of sound waves passing through an elastic medium. The speed varies with the medium employed (for example, sound waves move faster through water ... > more
• Cerebral Palsy
  Vegetarian
  Dietary Supplement
  Healthy Aging
  Sports Science
  Chemistry
   
  

  Magnesium

  Magnesium is the chemical element in the periodic table that has the symbol Mg and atomic number 12 and an atomic mass of 24.31. This alkaline earth metal is primarily used as an alloying agent to ... > 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
• Optics
  Medical Technology
  Acoustics
  Physics
  Thermodynamics
  Spintronics
   
  

  Microwave

  Microwaves are electromagnetic waves with wavelengths longer than those of terahertz (THz) wavelengths, but relatively short for radio waves. Microwaves have wavelengths approximately in the range of ... > more

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