Chemistry, asked by camron7064, 1 month ago

what is the important of sand clock or hour glass

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Answered by rosy1412
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Answer:

An hourglass (or sandglass, sand timer, sand clock or egg timer) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance (historically sand) from the upper bulb to the lower one.

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