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The second (symbol: s ), is a unit of time. There are 60 seconds in a minute, 60 minutes in an hour, and 24 hours in a day. This tradition dates back to the Babylonian . In science, a second is the time it takes for a caesium atom to vibrate 9,192,631,770 (around 9 billion) times. Scientists measure the second this way because the length of a ...
second विशेषण. a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first. उदाहरण. "second flute". "the second violins". coming next after the first in position in space or time or degree or magnitude. पर्यायवाची. 2d, 2d, 2nd.
Apr 9, 2019 · The second is currently defined using cesium atoms, which absorb and emit microwave radiation with a specific frequency. Atomic clocks count 9,192,631,770 of those microwave oscillations, and we call the elapsed time interval a second. Today, commercially available cesium clocks keep time to within 1/3,000,000 of a second per year.
27 meanings: 1. a. coming directly after the first in numbering or counting order, position, time, etc; being the ordinal.... Click for more definitions.
Jun 5, 2018 · SECOND ý nghĩa, định nghĩa, SECOND là gì: 1. immediately after the first and before any others: 2. the position in which a person finishes a…. Tìm hiểu thêm.
The second (symbol: s; abbreviation: sec.) is the name of a unit of time, and is the International System of Units (SI) base unit of time. SI prefixes added to the word second denote subdivisions of the second such as the millisecond (one thousandth of a second), or multiples of the second such as the kilosecond (one thousand seconds).
4 days ago · The second was used initially as a minimum calculation of time. But the evolution of time makes certain corrections to this concept. As of now, second is one of the fundamental units of time. You can find second definition Physics in terms of the radiation frequency. From previous concepts, second was used to define 1/86,400 of the mean solar ...
