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<a accesskey="3" href="page.php?w=supersonic_speed&amp;p=2">3.Next</a>
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<p><a href="page.php?w=Image%3AF-18-diamondback_blast.jpg">thumb</a><a href="page.php?w=Image%3AFA-18_Hornet_breaking_sound_barrier_%287_July_1999%29_-_filtered.jpg">right</a><b>Supersonic speed</b> is the speed of an object that exceeds the <a href="page.php?w=speed_of_sound">speed of sound</a> (<a href="page.php?w=Mach_number">Mach</a>&nbsp;1). For objects traveling in dry air of a temperature of 20&nbsp;°C (68&nbsp;°F) at <a href="page.php?w=sea_level">sea level</a>, this speed is approximately 343.2 m/s. Speeds greater than five times the</p><p>
<a accesskey="3" href="page.php?w=supersonic_speed&amp;p=2">3.Next</a>
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