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Pendulum catch trick M-m4n
A string with one hex nut at one end and 15 at the other is held by the single hex nut, with the rest of the string lying over a finger of the other hand. Release the nut. From Steve Spangler. Fishbane Chapter:   7.1 HRW 9th:   8.08 Reese Chapter:   8.9 RHK 5th:   12.3 SJ 3rd Chapter:   7.4 PIRA DCS classification:   1M40.171

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Physics Lecture Demonstrations at the Department of Physics and Astronomy
The Johns Hopkins University