PURPOSE: To show that the maximum coupling occurs between pendula of the same length.
DESCRIPTION: Adjust the length of the driver pendulum, on the left, so that it will couple to either of the other two. Coupling occurs through movement in the frame.
REFERENCES: (PIRA 3A70.20)
EQUIPMENT: Coupled pendulum apparatus with two fixed pendula and one adjustable pendulum, as photographed.
SETUP TIME: None.
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