In applied sciences, the equivalent radius (or mean radius) is the radius of a circle or sphere with the same perimeter, area, or volume of a non-circular or non-spherical object. The equivalent diameter (or mean diameter) ( D {\displaystyle D} ) is twice the equivalent radius.
In applied sciences, the equivalent radius (or mean radius) is the radius of a circle or sphere with the same perimeter, area, or volume of a non-circular or non-spherical object. The equivalent diameter (or mean diameter) ( D {\displaystyle D} ) is twice the equivalent radius.
Source: Wikipedia "Equivalent radius" · CC BY-SA 4.0
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