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0 sats \ 0 replies \ @adlai 3 Oct \ parent \ on: Whats the faster shockwave in this video? science
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sound is the adiabatic aka isentropic [ read, "reversible" ] news about the damage done by consecutive collisions that occur more densely than the material dissipates the news.
here's a similar situation that might give you a general intuition for how the idealised acoustic wave gets disrupted by supersonic displacement:
imagine you're sitting at the stern of a boat, watching the wake propagate; if you look aft, you'll see the nice idealized 45-degree wake and it'll appear to be two lines as you watch the distant edges. this surface wave is the two-dimensional analogy of a sonic boom, and if you toss pebbles into the space within the wake, you can see surface ripples which are directly analogous to regular sound waves. now get on waterskis behind the boat, and look towards it with the wake spreading around you, and watch what happens as the boat's speed increases: the wake's idealized shape doesn't change, although it becomes more dramatic, because the submerged portion of the hull must push aside a larger volume of water per unit time (take this to an extreme, and you get hydroplaning....)