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A Philips Sonicare 5100. This model has 2 cleaning modes . The brush head vibrates at hundreds of times per second, with the latest models at 31,000 strokes per minute (517 Hz) or 62,000 movements per minute [1] (1033 Hz).
Overall, consumers and experts seem to love Philips Sonicare for Kids toothbrushes — we picked one that comes with a charging stand, has over 17,000 five-star reviews from users, and has ...
A typical electric toothbrush. An electric toothbrush, motorized toothbrush, or battery-powered toothbrush is a toothbrush that makes rapid automatic bristle motions, either back-and-forth oscillation or rotation-oscillation (where the brush head alternates clockwise and counterclockwise rotation), in order to clean teeth.
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Numbers 5100 (the original 1903 prototype number 99 now being renumbered for the third time), 5123, 5118, 5145, 5124, 5126, 5120, 5116, 5133 and 5115, were renumbered 8100 to 8109. This 8100 class were intended to bolster the 6100 class on London suburban duties, with the smaller driving wheels giving a supposed benefit of better acceleration ...
The original 40 members of the 3100 class were renumbered 5100 and 5111 to 5149 in 1927. The first batches of 5101s filled in the numbers 5101 to 5110 and extended the class from 5150 to 5189. They were little changed from the Churchward locomotives as they then were, but had an increased axle loading of 17 long tons 12 cwt (39,400 lb or 17.9 t ...