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Frequency combNowadays, most of the standards of measurement are based on fundamental constants, and among all, the SI units of time and frequency are realized with the highest precision. The SI unit of time interval, i.e. second, is realized on the basis of a hyperfine transition of ...
type Hz A synonym for hertz, the SI unit of frequency. type J A synonym for joule, the SI unit of energy, work, amount of heat. type K A synonym for kelvin, the SI unit of thermodynamic (absolute) temperature. type kat A synonym for katal, the SI unit of catalytic activity. type...
SI Unit 国际标准单位 Base units can be combined to derive units of measurement for other quantities. In addition to the twodimensionlessderived unitsradian(rad) andsteradian(sr), 20 other derived units have special names. Named units derived fromSIbase units Other common units, such as thelitre...
kg "The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram."3rd CGPM (1901, CR, 70)The mass of one of . A litre is one thousandth of a cubic metre.A "The ampere is that constant current which, if maintained in two straight ...
What is the SI Unit of Luminous Intensity? The candela is the SI unit of luminous intensity. The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency \(540 \times {10^{12}}\) hertz and that has a radiant intensity in that...
What is the unit for resistance? What is a electrical transducer? What is electrical transducer? What are units of frequency? What is the unit for electrical energy? What is the unit of flow rate? What is the SI base unit for temperature?
What are units of frequency? What is the SI unit for speed? What SI units are used to measure volume? What does SI units mean? What is the SI unit of food energy? What is the kilometer an SI unit of? What is the SI unit of charge?
名称(Name) 符号(Symbol) 用SI基本单位和SI导出单位表示(Expression in terms of SI base units and other SI units) 频率(frequency) 赫[兹] (hertz) Hz 1 Hz=1 s-1 力(force) 牛顿(newton) N 1 N=1 kg·m/s2 压力,压强,应力(pressure, stress) 帕斯卡(pascal) Pa 1 Pa=1 N/m2 ...
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