Physics HW

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Across
  1. 2. we use 3D pictures to see ____
  2. 4. sound spreads and reflects off surfaces like ____ in caves
  3. 6. the sonar uses time of ____ to detect depth of water
  4. 10. people that set a record called ____
  5. 12. a sound wave is a ___ wave
  6. 13. there is a time between things that you hear and echo
  7. 15. 20-20000 Hz range is called ____ ranges
  8. 18. bat is animal that use ____
  9. 19. one of animal that use echolocation is called ____
  10. 20. instrument that almost same with guitar
Down
  1. 1. sound travel relatively ____
  2. 3. finding a distance with sonar is example of ____
  3. 5. the distinctive ____ that an instrument make is called timbre
  4. 7. frequencies are measure in
  5. 8. car that set a record called ____
  6. 9. ship have transmitter that produces ____ of ultrasound
  7. 11. ____ determine how loud sound is
  8. 14. high frequencies are measure in ____
  9. 16. main frequencies of note others name is the ____
  10. 17. transducer transmits ultrasound of ____