Across
- 3. system of interacting bodies with no net force.
- 5. a numerical value of a quantity.
- 9. there is no such thing as __rest or__motion.
- 11. force that is directed towards centre.
- 14. light detection and ranging speed gun.
- 15. nuclear reaction.
- 16. unit of torque.
- 18. Main source of heat energy.
- 19. are expert thermal climbers.
- 20. used to start-stop and reset button.
Down
- 1. unit of pressure.
- 2. predicted the interconversion of matter-energy.
- 4. first to notice the gravitational acceleration.
- 6. pictorial way of describing information.
- 7. branch of physics
- 8. height of object or place above sea level.
- 10. force along a string.
- 12. a line around which a body rotates,
- 13. plant or animal waste burnt as a fuel.
- 17. arrangement of two objects of unequal masses.