Anemometer is blowing on the back of the cup on the opposite end of the cross. Since a hollow hemisphere has a drag coefficient of .38 on the spherical side and 1.42 on the hollow side, more force is generated on the cup that is presenting its hollow side to the wind. Because of this asymmetrical force, torque is generated on the axis of the anemometer, causing it to spin. Theoretically, the speed of rotation of the anemometer should be proportional to the wind speed, because the force produced on an object is proportional to the speed of the fluid flowing
Field Music (Measure) Field Music (Measure) Field Music (Measure) is the third full-length studio album by indie rock band Field Music. It was released on 15 February 2010. Officially, the album's name is the same as their debut album; the name "Measure", other than being the name of one of the songs, does not appear anywhere on the album's artwork. However, both fans and the band have taken to calling it "Measure" to distinguish the two. "Measure" is a double album and is split into two discs. The first disc primarily contains more traditionally-structured songs, including both of the album's singles ("Them That