sound waves
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Our Sun: Helioseismology
We can’t see below the surface of the sun. That makes sense, really. We can’t see below the surface of the Earth, either — we have to get creative if we want to find out what goes on below the…
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The Doppler Effect
Have you ever heard the ice cream truck? When I was little, I remember hearing the ice cream truck all the time. Just the sound of the opening notes of “Pop Goes the Weasel” were enough to propel me to…
