Physics Revision

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Across
  1. 2. Russian nuclear disaster
  2. 7. 3x10^8 m/s is the speed of?
  3. 9. unit of heat
  4. 12. frequency
  5. 13. what causes your weight to change?
  6. 14. currently our main source of energy
  7. 15. Momentum is always?
  8. 17. Speed that instant
  9. 19. speed is part of this group
  10. 20. Unit of voltage
  11. 21. this energy increases with height
  12. 23. Who's law is V = IR
  13. 25. biggest contributor to background radiation (ray)
Down
  1. 1. Difference in velocity over a period of time
  2. 3. what is absorbed and splits uranium atom in Fission
  3. 4. control rods are made of...
  4. 5. displacement is part of this group
  5. 6. power of a lens
  6. 8. Another name for a converging lens
  7. 10. forces acting on a car moving at a constant speed
  8. 11. activity of a radioactive source
  9. 13. absorbed dose
  10. 16. equivalent dose unit
  11. 18. used to step up or down voltage
  12. 22. Who thought up the laws of motion?
  13. 24. Unit of momentum
  14. 26. type of reaction is Fission