This is my first time ever taking a physics class...and needed an explanation. In lab we're doing a simple pendulum experiment. Given the equation T=2pi(sqrt L/g) and noting observations with different pendulum lengths we must then answer this question: A hollow sphere is filled with water and suspended by a long thread. A small hole is made in the bottom of the sphere and as the water flows out one observes that the period of oscillation of the simple pendulum first increases and then decreases. Explain.