Across
- 2. Collisions in which no energy is gained or lost
- 3. The number of nuclei that decay in unit time (rate of decay of radioactive source)
- 5. Rate of change of angle (as measured between the radius from the centre of the circle to the object and one of the axes)
- 7. When two identical waves meet at a point and the waves are exactly in phase, the resulting wave has twice the amplitude of either of the original waves
- 8. Photons of high-energy electromagnetic radiation emitted as a result of a nucleus changing from an excited state into a lower energy state
- 10. Energy that a body has as a result of its motion
- 12. The energy required to raise a unit mass of a substance by 1 K
- 15. The rate of doing work
- 16. A point on a standing wave that is never moves – its amplitude is always zero
- 17. Waves that involve oscillations that are in the same direction as the direction of energy transfer
- 19. Motion where the acceleration of an object is always directed towards a fixed point and is proportional to its displacement from that fixed point
- 21. A unit that is defined in terms of fundamental units is said to be this
- 23. The rate of change of momentum of a body is proportional to the resultant force acting on the body
- 26. Amount of energy that is released when a nucleus is assembled from its component nucleons
- 27. The electrostatic force between any two point charges masses is proportional the product of the charges and inversely proportional to the square of their distance of separation
- 28. Time taken for one complete oscillation
- 29. Scientist who was able to show that conjugate quantities, position–momentum and time–energy, cannot be known precisely at the same time
Down
- 1. Fast-moving electrons or positrons that have been emitted as a result of a decaying unstable nucleus
- 4. The force per unit mass on a test point mass placed at that location
- 6. The lowest point of a transverse wave (the point of maximum negative displacement)
- 9. Moving charges give rise to these
- 11. Small 'packet' of electromagnetic energy
- 12. This is equal to the gradient of a distance–time graph and the area under an acceleration–time graph
- 13. The product of the resultant force acting on the object and the time for which this force acts
- 14. Maximum displacement from the mean position during one oscillation of a simple harmonic motion
- 18. These are formed when two waves of identical amplitude and frequency which are travelling in opposite directions meet
- 20. A material that does not allows the flow of charge through it
- 22. A nuclear reaction in which large nuclei are induced to break up into small nuclei and release energy in the process
- 24. The phenomenon of the spreading of a wave after an aperture or obstacle
- 25. The shortest distance between two points that are in phase with one another