from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun metrology Symbol for the femtohertz, an SI unit of frequency equal to 10−15 hertz.


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  • The frequency fHz is therefore: fHz ¼ ð3: 8865 Â 105 Þ = 6: 2832 ¼ 6: 1855 Â 104 Hz To obtain the frequency in kilohertz, divide by 103, and then round o ff to three signi fi cant

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