A hydrogen line in a star's spectrum has a frequency of 6.17x10^14 Hz when stationary. In Rigel's spectrum, is it shifted downward by 4.26x10^10 Hz. What is Rigel's velocity relative to us? (Unit=m/s)

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Ways that industry and agriculture use physical properties to separate substances

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?