Periodic Motion and Mechanical Waves (4A) Practice Test

A small object undergoes uniform circular motion at constant speed, used as an analogy for periodic biological rhythms. Which statement best reflects the relationship between angular speed $\omega$ and period $T$?

(Assume one complete revolution per period.)

A student measures wave speed in a fluid-filled tube (representing sound propagation in airway mucus) by sending a sinusoidal pressure wave down the tube. The source frequency is doubled while the fluid properties and tube remain unchanged. Which change is most consistent with wave behavior in this setup?

(Assume wave speed depends only on the medium.)