Which hypothetical scenario would result in the moon not having different phases? A he moon takes twice as long as it does now to orbit the earth.
B Earth takes twice as long as it does now to orbit the sun.
C Earth has two moons.
D The moon always stays in one position relative to the earth and sun.

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?