The of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time.
a. intensity
b. frequency
c. amplitude
d. compression

The reign of terror describes which period during the french revolution? a. when napoleon led a coup d'etat and seized power b. when the republic executed thousands of citizens c. when france was still a monarchy under king louis xvi d. when other european kingdoms attacked france