https://tcs.nju.edu.cn/wiki/api.php?action=feedcontributions&feedformat=atom&user=109.77.91.54TCS Wiki - User contributions [en]2026-05-26T13:17:31ZUser contributionsMediaWiki 1.45.3https://tcs.nju.edu.cn/wiki/index.php?title=Mach_number&diff=7687Mach number2015-02-28T14:50:40Z<p>109.77.91.54: </p>
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<div>A '''mach number''' is a [[number]] that describes [[speed]]. It is a measure of the speed of an object compared to the [[speed of sound]]. Mach number is given as a [[percentage]] compared to the local speed of sound. For example, half the speed of sound = Mach 0.5.<br />
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<math>M=v/a</math> <br />
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Where '''v''' is the speed of the object, and '''a''' is the [[speed of sound]]. <br />
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It is named after the [[Austria]]n [[physicist]] Ernst Mach. When writing a speed as a Mach number, the number comes after "Mach."<br />
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[[category:Fluid mechanics]]<br />
[[Category:Measurement]]<br />
{{math-stub}}</div>109.77.91.54