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