The Moment of Inertia for a thick-walled Cylindrical tube with open ends, of inner radius `r_1` and outer radius `r_2` and density `rho`. The following formula is used: `I_z=(pirhoh)/2(r_2^4=r_1^4)`, where:
The formula and definition are from Wikipedia (https://en.wikipedia.org/wiki/List_of_moments_of_inertia).