#physical_phenomenon  a natural phenomenon involving the physics of matter and energy
  subtype:  #atmospheric_phenomenon  #boundary_layer  #chaos  #decalescence  #electrical_phenomenon  #electricity  #energy  #power {#ectropy #entropy}  #event.physical_phenomenon  #field_of_force  #force  #hysteresis  #resonance  #mechanical_phenomenon {#opacity #transparence}  #optical_phenomenon  #pressure_level  #radiation  #reflection.physical_phenomenon  #refraction  #resolving_power  #resolution.physical_phenomenon  #conduction  #propagation  #fundamental_interaction  #surface_tension  #syzygy  #turbulency  #floatation
  supertype:  #natural_phenomenon__naturalphenomenon  all non-artificial phenomena
     supertype:  #phenomenon  any state or process known through the senses rather than by intuition or reasoning
        supertype:  sumo#process__proces__physicalsituation  intuitively, the class of things that happen and have temporal parts or stages; examples include extended events like a football match or a race, actions like pursuing and reading, and biological processes; sumo#process is not identical to pm#situation because an instance of pm#situation is not necessarily an instance of sumo#physical
           supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
              supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
           supertype:  pm#process_or_process_description
              supertype:  pm#processing_thing
                 supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                    supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
           supertype:  sumo#physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
              supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

3 statements are about indirect instances of #physical_phenomenon: pm#graph1_on_work.energy, pm#graph1_on_electromagnetism, pm#graph1_on_radiation
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