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Posted By: komal       Member Level: Silver       Posted Date: 26 Sep 2008       Category: Physics

The “Mach numbers” that are often used to measure aircraft speeds are based on the speed of sound. Mach 2 is double the speed of sound, Mach 3 is treble the speed of sound, and so on. At about what Mach number does light travel?

Select Answer:

Mach 90.
Mach 9,000.
Mach 900,000
Mach 90,000,000.




      
Your Test Score: 0 / 0



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