A physics 101 teacher was in a classroom doing a demonstration with a physics 105 professor. The physics 101 teacher had a bowling ball tied to a 20 meter chain coming down from the ceiling to a bowling ball. On the other side of the room, the physics 105 professor had a baseball tied to a 10 meter piece of rope. Both demonstrators took the balls at an angle of 15o from where it was hanging and let them swing. The pendulum with the highest frequency (lowest period)- e.g. the one that swung the fastest was