Hurricanes convert heat energy into mechanical energy, and hurricanes are categorized by the Saffir-Simpson Scale. Given these facts, something that converts heat energy to mechanical energy is categorized by what scale among the following options:
- engines
 - dangerous
 - supersonic
 - Energy.
 - electricity
 - a hydraulic system
 - kinetic energy
 - Saffir-Simpson


 

        Saffir-Simpson 