1. Develop three scenarios for comparable circular cylinders of radius R and square tubes of side H that allow one to say R ∼ H. (Hint: What geometric attributes of the cylinder and tube might be made equal?)
2. If a structural stiffness parameter was defined in terms of the pressure/radial deflection ratio (i.e., p/w), compare the stiffness parameters for a circular cylinder of radius R with that of a square tube of side H. What are the physical dimensions of these stiffness parameters and of their ratio? Assume that R ∼ H.
3. Given that the hoop strain is likely to be a very small number, estimate the pressureto-modulus ratio, p/E.