Assertion: flute's pipe | /r/HasProperty | open
Facets:
value: to the air
type: TRANSITIVE-OBJECT
value: at the ends
type: LOCATION
Source sentences:
text: The flute is an open pipe
text: The fact that the pipe is open to the air at the ends means that the total pressure at the ends must be approximately atmospheric pressure or, in other words, the acoustic pressure (the variation in pressure due to sound waves) is zero.