एक खोखले गोलाकार खंड जिसका बाहरी व्यास 8 सेमी और आंतरिक व्यास 6 सेमी है, की घूर्णन त्रिज्या (radius of gyration) क्या होगी?

Mohr's circle reduces to a point when an element is subjected to:

A steel column pinned at both ends has an Euler buckling load of 250 kN. If the column is restrained against lateral movement at its mid-height, its new buckling load will be:

What is the angle between the principal strain axis and the maximum shear strain axis in 2D strain analysis?