The determination of the speed of sound in the open was important for military
Temperature variations in theĪir also caused it to refract away from a straight course.
So that it had to travel in a curved path. This was not very accurate because the wind blew the sound away Knowing the distance of the cannon, the speed of sound could beĬalculated. Stood on a hill and timed the interval between the flash and hearing the Number – the ratio of the speed of the object to the local speedĮarly methods of finding the speed of sound in air used cannon. The important parameter in each of these situations is the Mach Regime, the high energies involved have significant effects on the air itself. In the transonic regime and very significant at supersonic speeds, when shock waves are present. Compressibility effects start to become important The various regimes of flight are subsonic (well below the speed of sound), transonic (near sound speed), supersonic (up to 5 times sonic speed), and hypersonic (above 5 times sonic speed). Is important because it is a measure of the shortest time in which a pressureĬhange con be transmitted from place to place. (760 mph), though it also varies slightly with humidity. So too does the speed of sound in air at 0☌, it is about 1,220 km/h Since temperature decreases with increasing altitude in the atmosphere, Of a gas, such as air, the speed of sound is independent of pressure but varies with the square root of temperature. The speed at which small disturbances travel through a medium.
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