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The Great Clock's pendulum bob (Big Ben)

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Uploaded on 16 Jul 2008

(There is no dialogue in this video) This is the pendulum bob for the Great Clock within Big Ben. The pendulum bob weighs 203 kg. The bob is made from concentric tubes of steel and zinc. Each period of the pendulum is 2 seconds. The total weight of the pendulum is 299 kg.

Visit http://www.parliament.uk/bigben for more information about the Clock Tower.

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