| 21. | Subsonic projectiles emit a shock wave that arrives after the muzzle blast.
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| 22. | The songs were recorded in Subsonic Society studios in Oslo.
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| 23. | Meanwhile, the rest of the airflow is subsonic.
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| 24. | Those engines are the most powerful ever built for a subsonic commercial airplane.
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| 25. | Alas, for the rest of us, subsonic exhaustion remains our fate.
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| 26. | Air France has tested its Concordes at subsonic speeds.
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| 27. | The pilot immediately slowed the plane to subsonic speed.
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| 28. | This marks the point where the solar wind slows down to subsonic speeds.
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| 29. | Downstream of this normal shock the air is subsonic.
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| 30. | At subsonic speeds the relationship between these is expressed by the Reynolds number.
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