Physics

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Across
  1. 2. used in sunbeds and flourescent lamps
  2. 5. current x voltage
  3. 7. force which stops things sliding around
  4. 8. wave is parallel to direction of travel
  5. 11. plastic case so doesnt need earth wire
  6. 13. preventing energy loss(heat)
  7. 14. thin piece of wire that melts if there is too much current
  8. 16. wave vibrations at 90 degrees with direction of travel
  9. 17. useful energy output/total energy input
  10. 19. unit of frequency
  11. 23. streched length-origianal length of a spring
  12. 24. unit of pressure (kg/m3)
Down
  1. 1. family of transverse waves
  2. 3. force x perpendicular distance
  3. 4. circular movement of air around a room
  4. 6. movement energy
  5. 9. name of brown wire in plugs
  6. 10. distance from crest to crest (waves)
  7. 11. mass/volume
  8. 12. frequency x wavelength
  9. 15. very dangerous wave
  10. 18. number of waves per second (1/T)
  11. 20. heat energy
  12. 21. force/area
  13. 22. a push or a pull