The rms speed is about 517 m/s, the average around 476 m/s, and the most probable speed is approximately 422 m/s. For practical calculations, like pressure, you'd use the rms speed. But when my son in Bengaluru worries about his startup's 'velocity', I tell him to focus on the most probable, steady progress, not the impressive rms numbers that cause anxiety. My own accounts from the rice mill taught me that the average, reliable figure is often the truest one for planning.
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