In a class debate, a student argues that the big bang theory is "just a theory." what is most likely to be this student's understanding of scientific theories? a. theories agree with observations of nature. b. theories are just guesses. c. theories are based on large amounts of scientific evidence. d. theories can be used to make predictions.

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?