馬赫

馬赫（粵拼：maa5 hak1，英文：Mach number）係用嚟表示速度嘅量詞，一馬赫即係一倍音速：:${\mathit {Ma}}={U \over C}\;$。

Link

• Gas Dynamics Toolbox Calculate Mach number and normal shock wave parameters for mixtures of perfect and imperfect gases.
• NASA's page on Mach Number Interactive calculator for Mach number.
• NewByte standard atmosphere calculator and speed converter