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quartz clock |
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quartz clock [′kwȯrts ¦kläk] (horology) A clock using the piezoelectric property of a quartz crystal, in which the crystal is introduced into an oscillating electric circuit having a frequency nearly equal to the natural frequency of vibration of the crystal. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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``That's the silent witness,'' he said Thursday, placing on the kitchen table a quartz clock with its hands broken at 9:37, the time the tree fell the night before in the 14700 block of Weddington Street. Horton invented the quartz clock in 1927, but the quartz watch didn't appear until the 1970s. About the size of a large coffee cup, the device contains a microprocessor that essentially keeps track of a quartz clock during the dives. |
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