You want to construct a physical pendulum with a period of 4.0 s at a location where g = 9.8m /s2. (a) What is the length of a simple pendulum having this period? (b) Assume the physical pendulum should be mounted in a case that is not more than0.5 m high. Can you devise a physical pendulum having a period of4.0 s that will satisfy this requirement? (Hint: consider a uniform slender rod of mass M and length L = 0.5 m and pivot the rod regarding an axis that is a distance d above the center of the rod)