TODAY'S PHYSICS OF THE DAY
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Physics: Mach number

Classical MechanicsRelativity
Physics: Mach number
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Mach number

The Mach number (M or Ma), often only Mach (; German: [max]), is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound.

Commentary

Commentary

Source: Wikipedia
Mach number The Mach number (M or Ma), often only Mach (; German: [max]), is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound.

Commentary

Source: Internal
What is Mach number, and why does it matter? This concept appears everywhere in physics. Once you understand it, a wide range of natural phenomena start to make sense. M = u c , {\displaystyle \mathrm {M} ={\frac {u}{c}},}

Commentary

Source: Wikipedia
Deep dive: Mach number The Mach number (M or Ma), often only Mach (; German: [max]), is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after Austrian-Czech physicist and philosopher Ernst Mach. M = u c , {\displaystyle \mathrm {M} ={\frac {u}{c}},} where: