Imagine that all the frequencies nature affords were laid out on an extended piano keyboard. Never mind that some waves are mechanical, propagated through air or some other fluid, and other waves are electro-magnetic and can pass through a vacuum. Lay them down together, and what do you get?
The startling answer is a surprisingly narrow piano.
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As the US decides, so can you
Subscribe today and get a $50 Amazon gift card if you correctly predict the next US president.
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