Depends on where you are standing. Do you/they know what creates it?https://twitter.com/pipteach/status/782628230733889537 …
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Replying to @GenChuckYeager
can you explain why the sound barrier has a visual effect?
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Replying to @ygini @GenChuckYeager
explosive decompression, as a result of which water vapour condensates in the air
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Replying to @bankpainmusic @ygini
What is your source? Or are you just guessing?
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Replying to @GenChuckYeager @ygini
studying aerospace engineering, i was taught it's soundwaves positively interfering to create pressure troughs
10:42 AM - 2 Oct 2016
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