Yes, that's correct. The note "A" (which is used to tune the other strings of the guitar) corresponds to a frequency of 440 Hz.
Quantitative because it tells you how many wheels
When air<span> particles bunch up, it's </span>called<span> a compression-rarefaction.
When the </span>particles spread apart<span> its </span>called<span> a rarefaction.
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3x10^8 m/s, or the ‘speed of light’ - this applies to the entire spectrum
