Across
- 2. use your left hand
- 3. subatomic particle made of 3 quarks
- 4. unit of sound intensity
- 7. attraction between different substances
- 10. moving part of an electric motor
- 12. name of a number
- 13. rate of change of velocity
- 17. two waves together
- 18. for measuring air pressure
- 19. overtone
- 21. heat is taken in
- 23. positive terminal of a cell
- 24. spreading out of waves
- 28. unit of luminosity
- 29. balanced forces
- 30. it has similar atoms
- 33. it does not change
- 34. flow of charge
- 36. depends on the square of the amplitude
- 37. suspension of particles of liquid in a gas
- 38. science of sound
- 39. ten to the nine
Down
- 1. kelvin minus 273
- 3. unit of radioactivity
- 5. detects small electric currents
- 6. liquid to gas below the boiling point
- 8. unit of charge
- 9. splitting of an atom
- 11. causes objects to float
- 12. instrument to measure height
- 14. towards the centre
- 15. base units
- 16. breakdown through radioactivity
- 20. output to input
- 22. stores electric charge
- 25. number of waves per second
- 26. 745.7 watts
- 27. force times time
- 29. electromotive force
- 31. ask Newton
- 32. an isotope of hydrogen
- 35. the ability to do work
- 36. a charged atom
- 37. without an echo