Energy Power & Mechanics Crossword Puzzle

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Across
  1. 4. physical power or force of a living being.
  2. 6. advantage the ratio of output force to input force.
  3. 8. an assembly of such parts.
  4. 9. a rigid bar the pivots one point.
  5. 10. energy renewable source of fuel to produce energy.
  6. 12. energy energy created from the wind.
  7. 13. productive or operative activity.
Down
  1. 1. a form of energy generated by the conversion of free falling water.
  2. 2. energy energy released by reactions within atomic nuclei, as in nuclearfission or fusion.
  3. 3. energy a form of energy obtained from within the earth.
  4. 5. the branch of physics that deals with the mechanical properties of airand other gases.
  5. 7. energy energy obtained by harnessing tidal power.
  6. 11. energy energy derived from the sun in the form of solar radiation.