Assertion: turbine's speed | /r/ObjectUse | used for this purpose
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: The speed at the tip of the blade is usually used for this purpose, and is written as the product of the blade radius r and the rotational speed of the wind: U = Ω r {\displaystyle U=\Omega r} , where Ω {\displaystyle \Omega } is the rotational velocity in radians/