What are the characteristics of continental tropical air masses? They have cool, dry air.
They have warm, dry air.
They have cool, moist air.
They have warm, moist air.

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?