PLEASE HELP ME WITH THIS
The highest frequency of sound that can be detected by human ears is around 2.0 × 104 Hertz. If the speed of sound is 343 m/s, what is that sound’s wavelength?

The correct answer is c. hope this

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

The waves slow downn

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