maa5 haak1馬赫马赫
Jyutpingmaa5 haak1
Yalemáh hāak
Definition
Mach number; the ratio of the speed of an object in a fluid to the local speed of sound.
neutraltransportother
How it's used
Scientific and technical contexts are where this term exclusively lives. It functions as a dimensionless quantity rather than a standard unit of measurement, serving as a ratio to compare an object's speed against the local speed of sound. You will rarely hear it outside of aviation, aerospace engineering, or science fiction discussions.
Examples
This fighter jet is flying at Mach 2.
Do you know how the Mach number is calculated?
Related words
Common mistake
Beginners often mistakenly treat it as a direct unit of speed like kilometers per hour, forgetting that the actual speed in meters per second changes depending on the temperature and density of the surrounding air.
Grammar color guide
Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector
Grammar guides
- NegationHow to say no, not, didn't, and don't in Cantonese. The four main negation words and when to use each one.
- Numbers and moneyCounting, talking about money, and asking how much things cost. Includes the two words for two and the everyday words for dollars and cents.
- Aspect markersCantonese has no tenses, but it does have aspect markers. Learn how zo2, gwo3, gan2, and hai2 dou6 show completion, experience, and ongoing action.
