Across
- 4. electrical potential difference (7)
- 9. a type of wave including light and x-rays (15)
- 15. the rate of flow of charge (7)
- 16. the rate of change of velocity (13)
- 17. the rate at which energy is transferred (5)
- 19. mass multiplied by velocity (8)
Down
- 1. a disturbance that transfers energy through space or matter (4)
- 2. the time for half of the radioactive substance to decay (9)
- 3. energy transferred as waves or particles (9)
- 5. the capacity to do work (6)
- 6. the number of waves that pass a point in a second (9)
- 7. opposition to current in a circuit (10)
- 8. the amount of matter in an object (4)
- 10. a property of matter that causes electric effects (6)
- 11. a force that attracts iron and some other materials (9)
- 12. speed in a given direction (8)
- 13. a push or a pull (5)
- 14. the force of gravity acting on mass (6)
- 15. the principle that energy stays constant (12)
- 18. done when a force moves an object (4)