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Old 09-02-2018, 07:33 PM
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kinetic (Steve)
ATMer and Saganist

kinetic is offline
 
Join Date: Jun 2008
Location: Adelaide S.A.
Posts: 2,293
Can anyone explain why they cause a sonic boom?
In simple terms I understand, they aren't travelling at over or near the
speed of sound in that phase are they?
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