A midi-cholorian moves in a horizontal circle at constant speed. It takes T seconds to complete one trip around the circle. It moves with centripetal acceleration of A. Which of the following gives an expression for the radius, R, of the circular path? A. T^2A/4π^2
B. TA/2π
C. 4π^2/T^2A
D. T/A
E. 2πr/A

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?