# Frequency

Pronunciation: /ˈfri.kwən.si/ Explain
Plural - Frequencies

 Click on the point on the slider and drag it to change the figure. Manipulative 1 - Frequency Created with GeoGebra.

Frequency is the number of cycles that occur each time period. Frequency is often usually measured in hertz (hz). 1 hz is one cycle per second. Frequency is often used to measure waves. When measuring waves, frequency is the number of waves that pass each second.

 Sound Middle 'C' is 440 hz. Electricity In North America, and northern South America, electric power is transmitted at 60hz. In most other areas, electric power is transmitted at 50hz.

### References

1. McAdams, David E.. All Math Words Dictionary, frequency. 2nd Classroom edition 20150108-4799968. pg 82. Life is a Story Problem LLC. January 8, 2015. Buy the book

• McAdams, David E.. Periodic function. allmathwords.org. All Math Words Encyclopedia. Life is a Story Problem LLC. 8/15/2010. https://www.allmathwords.org/en/p/periodicfunction.html.

McAdams, David E. Frequency. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. https://www.allmathwords.org/en/f/frequency.html.

### Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)