Energy basics

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Across
  1. 3. This is a measure of the fraction of useful work done
  2. 5. In all physical processes, energy tends to spread out and become less ......
  3. 6. ... stored in an object high above the ground
  4. 9. ... of a moving object
  5. 12. ... carried by visible photons
  6. 13. ... stored within the bonds between atoms
  7. 14. ALL energy transfers MUST obey this type of law of physics
  8. 15. When this is done, energy is transferred
Down
  1. 1. Energy that is stored in some way
  2. 2. ... carried by acoustic vibrations of a material
  3. 4. ... carried by charged particles
  4. 7. ... stored within a body above zero degrees kelvin
  5. 8. ... stored in a stretched or squashed material
  6. 10. ... stored within the atom
  7. 11. This is what all energy eventually ends up becoming