Crossword Puzzle in Physical Science

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Across
  1. 3. known for his observations and expemirents with telescopes
  2. 6. change in velocity of moving object
  3. 9. newtonian physics
  4. 14. it travels at a speed of 3×10^8km/sec
  5. 15. the laws of physics are the same in all inertial frame
  6. 17. equal to the mass multiplied by the speed of light
  7. 18. when the mass of an object becomes massive the energy needed to move it becomes ____
  8. 19. special theory relativity
Down
  1. 1. ____ hole is a region in which gravity is too strong
  2. 2. are relative to selected reference frame or viewpoint
  3. 4. where an observer does not accelerate
  4. 5. electromagnetic theorybof light
  5. 7. speed of moving object with direction
  6. 8. preceives lengthvdifferently while moving at a constant speed
  7. 10. impossible for the two events to occur simultaineously for two observers
  8. 11. amount of matter in an object
  9. 12. apparent difference in the time interval
  10. 13. Law of universal gravitation
  11. 15. change of orientation of the ratational axis
  12. 16. a force that pulls the object with mass