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speed of sound |
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speed of sound [′spēd əv ′sau̇nd] (acoustics) The phase velocity of a sound wave. Also known as sonic speed; sonic velocity; sound velocity; velocity of sound. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The first sustained speeds approaching Mach 7, or seven times the speed of sound, the second reached almost Mach 10. If Superman flies at the speed of sound through 20[degrees]C (68[degrees]F) air, he would be moving at a rate of 342 meters (1,122 feet) per second. The spacecraft will hurtle 80 miles into space, rising vertically and reaching Mach 1 (600 mph) in less than 10 seconds, ultimately traveling at three times the speed of sound. |
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