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100 - ATPL Question Bank in English - A Machmeter may derive Mach number from the ratio of impact pressure to static pressure. With Pt denoting total pressure and Ps denoting static pressure, which expression gives that particular ratio?

Question 100 - Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot Licence

(Pt - Ps)/Ps
(Pt + Ps)/Ps
(Pt - Ps)/Pt
Pt/Ps

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