Biotite mica and muscovite mica have different chemical compositions. Compared to the magma from which biotite mica forms, the m
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A pendulum clock is a mechanical device. It relies on a pendulum swinging at a steady pace, with energy to the pendulum provided by a spring. ... A quartz clock relies on the exactly repeating vibration of a thin sliver of quartz. This vibration creates an electrical current that controls the electronic display.
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