Physics grade 9

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Across
  1. 2. unit of power
  2. 3. sound energy is produced by .......... objects.
  3. 5. an instrument of time
  4. 7. SI unit of time
  5. 8. amount of substance in a body
  6. 10. it always opposes motion
  7. 13. the method to determine the volume of an irregular solid
  8. 16. when 2 or more cells connected together
  9. 19. the ........ of a thermometer contains the mercury.
  10. 20. it is a virtual line which is perpendicular to the mirror line
  11. 21. when the right hand side be omes the left hand side and vice versa
  12. 24. The .......... of a laboratory thermometer is 0 to 100 C.
Down
  1. 1. a physical quantity consists of a unit and a.............
  2. 4. unit of kinetic energy
  3. 6. curved surface of a liquid
  4. 7. water flows out through it when the irregular object is placed in the displacement can
  5. 9. to open or close a circuit
  6. 11. a force of 20 N acts on an object through a distance of 100 cm, the work done is
  7. 12. the unit of force
  8. 14. this error occurs due to the wrong position of the eye
  9. 15. it is a thermometric liquid
  10. 17. the incident and reflected angles are........
  11. 18. capacity to do work
  12. 22. these objects possess light energy
  13. 23. time taken for an oscillation