PHYSICS

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Across
  1. 5. state of randomness in a system
  2. 7. frequency is above 20,000 Hz
  3. 10. change in length of an object when heated
  4. 12. reaction of an object to a force to equate frequencies with the natural frequency of an object
  5. 13. a moving area of colliding molecules
  6. 15. method of heat transfer through a heated substance; example is air and water
  7. 19. degree of hotness or coldness of an object, place or substance
  8. 20. device that transforms heat energy to mechanical work
Down
  1. 1. method of heat transfer that happens through infrared rays
  2. 2. branch of physics that deals with heat and other energy forms
  3. 3. method of heat transfer that happens through direct contact
  4. 4. rhythmic and timed changes in sound intensity
  5. 6. device used to study sound waves
  6. 8. type of energy related to the randomness and disordered motion of molecules
  7. 9. product of vibration of moving objects
  8. 11. frequency is below 20 Hz
  9. 14. emitted by a source of vibration
  10. 16. unit for measuring the intensity of sound
  11. 17. emitted when sound bounces back on a hard surface
  12. 18. the upper part of the wave