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15th-century rotating dial clock face, St. Mary's Church, Gdańsk, Poland. The word clock derives from the medieval Latin word for "bell"; clocca, and has cognates in many European languages. Clocks spread to England from the Low Countries, [1] so the English word came from the Middle Low German and Middle Dutch Klocke. [2]
The English word clock first appeared in Middle English as clok, cloke, or clokke. The origin of the word is not known for certain; it may be a borrowing from French or Dutch, and can perhaps be traced to the post-classical Latin clocca ('bell'). 7th century Irish and 9th century Germanic sources recorded clock as meaning 'bell'. [74]
It can be a printed page that a child completes with a writing instrument. No other materials are needed. In education, a worksheet may have questions for students and places to record answers. In accounting, a worksheet is, or was, a sheet of ruled paper with rows and columns on which an accountant could record information or perform calculations.
The time between each gēng is 1 ⁄ 10 of a day, making a gēng 2.4 hours—or 2 hours 24 minutes—long. The 5 gēngs in the night are numbered from one to five: yì gēng ( 一 更 ) (alternately chū gēng ( 初更 ) for "initial watch"); èr gēng ( 二更 ); sān gēng ( 三更 ); sì gēng ( 四更 ); and wǔ gēng ( 五更 ).
A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an approximate harmonic oscillator: It swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates.
Simon Willard (April 3, 1753 – August 30, 1848) was a celebrated American clockmaker.Simon Willard clocks were produced in Massachusetts in the towns of Grafton and Roxbury, near Boston.
This is because it has proven difficult to distinguish from the meager written documentation which of these early tower clocks were mechanical, and which were water clocks; the same Latin word, horologe, was used for both. [23] [11] None of the original mechanisms have survived unaltered. Sources differ on which was the first clock 'known' to ...
Al-Jazari's candle clock. Al-Jazari described a candle clock in 1206. [4] It included a dial to display the time and, for the first time, employed a bayonet fitting, a fastening mechanism still used in modern times. [5] The English engineer and historian Donald Routledge Hill described one of al-Jazari's candle clocks as follows:
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related to: clock worksheets for grade 2 without regrouping chart for kids word search