by 3 hours ago
ANSWERS: 4
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When an object passes through the air, say a supersonic aircraft. It generates a shock wave. This is caused by molecules of air striking the front of the airframe and boucing off. The faster the aircraft goes the more this shockwave builds up in front of the aircraft. As these molecules do not travel faster than the speed of sound a 'barrier' is created which the plane must break through to achieve the speed of aound. This is accompanied by an explosive sound. This can also be heard when cracking a whip as the end of the whip passes through the sound barrier. When the Land Speed record finally breached the sound barrier, a photograpgh taken of Thrust SSC shows this shockwave building up in the dust and vapour around it.
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Air rushing back into the empty space behind an object moving faster than the speed of sound.
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The shocked waves.
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When something brake the sound barrier (goes faster than the speed of sound) it creates a sonic boom. However thunder is not a sonic boom it is caused by lightning heating up particles quickly so they expand then they lose there energy and contract. Lightning/electricity cannot make a sonic boom
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