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Equivalent diameter – Radius of a circle or sphere equivalent to a non-circular or non-spherical object Eratosthenes , who calculated the diameter of the Earth around 240 BC. Graph or network diameter – Length of shortest path between two nodes of a graph
The hydraulic diameter is the equivalent circular configuration with the same circumference as the wetted perimeter. The area of a circle of radius R is . Given the area of a non-circular object A, one can calculate its area-equivalent radius by setting = or, alternatively:
Since the diameter is twice the radius, the "missing" part of the diameter is (2r − x) in length. Using the fact that one part of one chord times the other part is equal to the same product taken along a chord intersecting the first chord, we find that (2r − x)x = (y / 2) 2. Solving for r, we find the required result.
This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...
Ionic radius, r ion, is the radius of a monatomic ion in an ionic crystal structure. Although neither atoms nor ions have sharp boundaries, they are treated as if they were hard spheres with radii such that the sum of ionic radii of the cation and anion gives the distance between the ions in a crystal lattice .
But the choice of whether to roast versus bake a certain item of food often comes down to one simple thing: temperature. Meet The Experts Chef Katie Button , co-founder of Cúrate Bar de Tapas and ...
When a circle's diameter is 1, its circumference is . When a circle's radius is 1—called a unit circle —its circumference is 2 π . {\displaystyle 2\pi .} Relationship with π
Something happened, and you need money. Urgently. You look at your savings account. Tumbleweeds roll across the place your emergency fund should occupy. Meanwhile, your credit card beckons with ...