Assertion: helium | /r/HasProperty | useful
Facets:
value: due to low prandtl
type: CAUSE
value: for thermoacoustic refrigeration
type: PURPOSE
value: due to number
type: CAUSE
value: because of thermally
type: CAUSE
value: in impulse facilities
type: LOCATION
value: because of perfect
type: CAUSE
value: because of its inertness
type: CAUSE
value: in supersonic wind tunnels
type: LOCATION
Source sentences:
text: Because of its inertness, thermally and calorically perfect nature, high speed of sound, and high value of the heat capacity ratio, it is also useful in supersonic wind tunnels and impulse facilities.
text: Helium, mixed with a heavier gas such as xenon, is useful for thermoacoustic refrigeration due to the resulting high heat capacity ratio and low Prandtl number.