All units crossword puzzle

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Across
  1. 4. rollercoaster has a lot of it
  2. 6. very small
  3. 7. the quantity of matter
  4. 8. A Hot Air Balloon
  5. 11. types of waves
  6. 15. pressure from electrical circuit source
  7. 18. balloon and hair experiment
  8. 23. used to measure acceleration
  9. 24. propelled by a force
  10. 25. rate of change of velocity
  11. 27. fast or slow
  12. 28. type of energy
  13. 30. light bulb
  14. 33. quantity with a size or magnitude only
  15. 34. negative
  16. 36. short duration interaction
  17. 37. camera has these
  18. 39. devoid of matter.
  19. 40. the SI unit of power
  20. 41. SI unit of work or energy
  21. 42. straight
  22. 46. Isaac
  23. 47. also called heat energy
  24. 48. driven by electrical energy
  25. 49. display
  26. 50. When ironing a piece of clothing...
  27. 51. sun rays
Down
  1. 1. passive two-terminal electrical
  2. 2. rainbow prism
  3. 3. far away
  4. 5. longitude of wave
  5. 9. resistance of any physical object
  6. 10. resulting from motion.
  7. 12. measured from position of equilibrium.
  8. 13. affects pitch
  9. 14. strength or energy exerted
  10. 16. a space of time between events
  11. 17. all electromagnetic waves are
  12. 19. top point of wave
  13. 20. rate of change of its position
  14. 21. positive
  15. 22. measure of how springy an object is
  16. 26. quantity that has magnitude direction
  17. 29. inside atom
  18. 31. electricity can pass through
  19. 32. one path current
  20. 35. down
  21. 38. used for weapons
  22. 40. ocean
  23. 43. electric charges at rest
  24. 44. mirror image
  25. 45. multiple path current