Prepare for the Certification in Clinical Sleep Health exam. Use flashcards and multiple-choice questions with hints and explanations. Ace your exam!

Multiple Choice

Hz is the abbreviation for which unit?

Hz denotes the unit of frequency in the SI system. Frequency tells you how many cycles occur each second in a periodic event, like a sound wave or an alternating current. The unit is named after Heinrich Hertz and is written as hertz, with the symbol Hz. One hertz equals one cycle per second, and we commonly use multiples such as kilohertz (kHz) or megahertz (MHz) for higher frequencies. The other options aren’t recognized units.

Hz denotes the unit of frequency in the SI system. Frequency tells you how many cycles occur each second in a periodic event, like a sound wave or an alternating current. The unit is named after Heinrich Hertz and is written as hertz, with the symbol Hz. One hertz equals one cycle per second, and we commonly use multiples such as kilohertz (kHz) or megahertz (MHz) for higher frequencies. The other options aren’t recognized units.