Most wire or string is made with a circular cross section of some particular radius and diameter. The area of that cross section is the well known A = pi*R² which is colloquially pronounced as “pie ...

The hypothesis used in developing the stress and strain in the shaft is that all points on a cross-section of the shaft experience the same angle of twist. The angle of twist for a section of length L ...

But researchers had previously only studied the distribution of dye in two cases: a pipe with a circular cross section and one that’s like a long, flat channel. Camassa and his colleagues have now ...

r\) is the radius of the circular cross-section and \(h\) is the height of the cylinder. If the diameter, \(d\), of the circular cross-section is given, this is halved to find the radius.