In the northern hemisphere, june 21 has than december 21. a. longer days and more direct sunlight b. longer days and less direct sunlight c. shorter days and more direct sunlight d. shorter days and less direct sunlight

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

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?