Slightly Harder Physics

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Across
  1. 5. Distance between two successive wave crests (10)
  2. 7. Bouncing back of light or sound waves (10)
  3. 9. Push or pull acting on an object (5)
  4. 13. Maximum displacement of a wave from its rest position (9)
  5. 17. Region around a mass where gravity acts (18)
  6. 19. Stored energy due to position or condition (15)
  7. 20. Electric potential difference between two points (7)
Down
  1. 1. Product of mass and velocity (8)
  2. 2. Scientist who formulated the three laws of motion (6)
  3. 3. Energy possessed by a moving object (12)
  4. 4. Rate of change of velocity (12)
  5. 6. Force that opposes motion between surfaces (8)
  6. 8. Closed path through which current flows (7)
  7. 10. The study of matter, energy, and their interactions (7)
  8. 11. Energy transferred when a force moves an object (4)
  9. 12. Rate at which work is done or energy is transferred (5)
  10. 14. Force exerted per unit area (8)
  11. 15. Flow of electric charge (7)
  12. 16. Opposition to the flow of electric current (10)
  13. 18. Resistance of an object to a change in motion (7)