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1.calculate th speed of waves in water that are 0.4m apart and have a frequency of 2hz?
2. sound waves travel at approximately 340m/s what is the wavelength of a sound with a frequency of 20Hz? what is the wavelength of a sound with a frequency of 20 kHz?
3.a bat flying in a cave emits a sound pulse and receives its echo in one second. how far away is the cave wall?

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charlie

  1. 210HZ

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    kris

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