The speed of sound changes with different atmospheric conditions, but is around 340 meters per second.
That's equivalent to (340 x 3,600) = 1,224 kilometers per hour
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The speed of sound in air is approximately 343 meters per second, which is equivalent to about 1235 kilometers per hour.
The speed of sound in air is approximately 343 meters per second, which is equivalent to 1235 kilometers per hour. The speed of light in a vacuum is about 299,792 kilometers per second.
The speed of light equals the wavelength (metres) times the frequency (cycles per second). For other waves such as sound waves the wave speed varies but for light the wavelength times the frequency always equals 300 000 km/s, as long as it's traveling through vacuum.
The speed of light in vacuum is 299,792,458 m/s usually rounded to 300,000 km/sec.The speed of sound at sea level is 343 m/s.The difference is 299,792,115 m/s.That's 99.999 886 % of the speed of light, and may also be rounded to 300,000 km/sec.
1 km equals 100,000 mm
33333cm equals 0.33333km @100000cm per km