Anemometer. View of a four-cup anemometer,used to measure wind speed. The wind makes the cups rotate around a central shaft. As they rotate,centripetal force makes the yellow arms move outward,lifting the indicator ring that shows the wind speed on the central stalk | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4284 px × 4284 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |