Energy

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  1. 2. collision: A collision between two objects in which the deformation is so severe that they stick together. While total momentum is conserved, total kinetic energy is greatly reduced by the amount of energy required to deform the objects.
  2. 5. energy: The potential energy stored in an atom’s nucleus that is released or absorbed when an atom experiences nuclear fission or fusion.
  3. 6. The ability to do work. It is a positive scalar quantity measured in joules (J).
  4. 8. of energy: Law stating that the total amount of energy entering the process equals the total of all the forms of energy that exist at the end of the process. Also known as the first law of thermodynamics.
  5. 10. energy: The sum of the kinetic energies of all the particles in an object, directly proportional to the temperature of the object.
  6. 12. For a machine or process, the ratio of energy or work produced to the energy or work present beforehand; a measure of the effectiveness of the machine or process for converting energy from one form to another.
  7. 14. The SI unit for energy and work; 1 J = 1 kg⋅m2/s2 = 1 N⋅m.
  8. 15. energy: The transmission of energy through matter by the periodic motion of particles (mechanical waves).
  9. 16. elastic collision: A collision between two objects in which momentum is conserved but some of their kinetic energies is lost to other forms of energy during the collision. The objects are slightly deformed but rebound.
  10. 17. energy: The energy equivalent to matter itself, according to the equation in Einstein’s special theory of relativity, E = mc2.
  11. 19. energy: The potential energy stored in the chemical bonds between atoms that is released or absorbed during chemical reactions.
  12. 20. energy: The ability of a magnetic field to do work on magnetic objects and on moving electrical charges.
  13. 21. law of thermodynamics: Law stating that energy and matter cannot be created or destroyed, only changed in form. See also conservation of energy.
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  1. 1. energy: The energy of a system due to its position or its motion.
  2. 3. energy : The energy of motion which depends only on the system’s mass and speed; a form of mechanical energy.
  3. 4. potential energy: The potential energy of a system due to its weight and its height above a zero reference height.
  4. 7. energy: The ability to do work through the action of the electromagnetic force on and by electrical charges.
  5. 9. energy: The energy of a system due to its position or condition; a form of mechanical energy.
  6. 11. motion: Recurring back-and-forth or cyclical motion of a system in a regular time interval, called a period.
  7. 13. potential energy: The potential energy of a system due to an elastic force acting on it and its distance from a zero reference position.
  8. 18. energy: The combined action of electrical and magnetic energies in the form of wavelike, radiant energy.