In which part of the electromagnetic spectrum would photon d be found?

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

The air that we breath is made mostly of which gaseous molecule

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?