is sonic boom appear from lower speed speed up to supersonic speed or from supersonic speed decrease to the lower sonic speed?
it is better to use chinese to explain plz
about sonic boom
2010-04-26 6:26 am
回答 (2)
2010-05-06 1:11 am
2010-04-29 5:19 am
No. Sonic boom only appears when an object (e.g. a jet plane) is travelling with speed equal to or faster than the speed of sound. It will not occurs at sub-sonic speed (i.e. speed below the speed of sound).
Thus, when the object moves from sub-sonic speed to supersonic speed, the "boom" starts to appear when the speed of sound is reached, and it (the boom) will persist as long as the speed (of the object) is maintained above the speed of sound.
When the object decreases its speed from supersonic to sub-sonic, the "boom" will disappear once the sub-sonic speed is reached.
Thus, when the object moves from sub-sonic speed to supersonic speed, the "boom" starts to appear when the speed of sound is reached, and it (the boom) will persist as long as the speed (of the object) is maintained above the speed of sound.
When the object decreases its speed from supersonic to sub-sonic, the "boom" will disappear once the sub-sonic speed is reached.
收錄日期: 2021-04-29 17:34:15
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