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sonic booms

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postino | 07:55 Wed 10th Dec 2008 | How it Works
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What causes a sonic boom when a plane breaks the sound barrier
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Avatar Image Rev. Green
Normally, all the sound from a plane reaches you at different times - you hear it it one part of the sky, then in another part. But when a plane travels at the speed of sound all the sound reaches you at the same time.
21:58 Fri 26th Dec 2008
Avatar Image vrach
A plane traveling faster than the speed of sound(330 m per sec) will always be able to "run away" from its own sound(noise).As the plane drops speed,e,g.approaching an airport,"old" noise,closely trailing it will collide with "new' noise producing a CLAP (sonic boom)-unfortunately, usually near residential areas close to airports!
02:18 Thu 01st Jan 2009

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