Why must astronauts use microphones and headphones in outer space

Ineed with these 2 questions. you.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?