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Antariksh (Cosmos) 🌌 ☄️ on Instagram: "What is Mach? Mach number is simply a ratio of your true airspeed to the local speed of sound. In terms of a formula, you can write it as: Mach number (M)= True Airspeed (TAS) / Speed of Sound (a) This means Mach 1 is the speed of sound, Mach 0.5 is half the speed of sound, Mach 2 is twice the speed of sound, and so on. It’s clear to see from the formula that Mach number is nothing more than a simple ratio or a comparison. Since it’s a ratio, it doesn’t ma