Please Help / Bell-Ringer / Ez 20 Points / Answers Only Or Report Star A is traveling quickly away from Earth, while Star B is traveling quickly toward Earth. Write a few sentences comparing the speed and colors of light that Earth observers see from each star.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

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?