Question

the ratio of the speed of an airplane to the speed of sound is measured in
select
select numbers
select
mark
mack
mach
question 28
1 pts

Explanation:

The ratio of an airplane's speed to the speed of sound is measured in Mach. Mach number is the standard unit for this ratio, representing how many times the speed of sound an object (like an airplane) is moving. The other options (Mark, Mack, Mach - wait, Mach is the correct term here; the options seem to have a typo with "Mach" being the correct one for this concept.

Answer:

Mach (the option labeled "Mach" among the choices)