Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Anderson, Elizabeth Garrett to Arctic tern


wind rotation speed

Anemometer, instrument for measuring wind speed. The rotation type of mechanical anemometer estimates wind speed from the rotation of cups mounted on a vertical shaft. The sonic or acoustic anemometer depends on the velocity of sound in the wind. In laboratories, air flow is estimated from the change in resistance it causes by cooling an electrically heated wire.

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