[Answer] Mach 1 is equivalent to what speed?

Step 1 : Introduction to the question "Mach 1 is equivalent to what speed?"

...1. Speed of light 2. 100 miles per hour 3. Speed of sound 4. 1,000 miles per hour

Step 2 : Answer to the question "Mach 1 is equivalent to what speed?"

Speed of sound - The Mach number of an object refers to its ratio to the speed of sound. The exact speed of sound varies according to atmospheric factors and the density of the medium through which the sound is traveling. However, it is generally accepted at 761 mph at sea level. Therefore, an object traveling at Mach 1 is traveling at 761 mph, while an object reaching Mach 5 is traveling at five times the speed of sound. It is named for physicist Ernst Mach was first photographed an object traveling at the speed of sound in 1887. The highest recorded speed is Mach 9.6, achieved in 2004 by NASA's X-43A jet.:

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