* Hz stands for Hertz, the unit of measurement for frequency.
* Frequency refers to the rate at which something repeats or oscillates.
Example:
* Sound: A sound wave with a frequency of 15Hz would be a very low-pitched sound, likely inaudible to humans.
* Light: Light waves with a frequency of 15Hz would be in the extremely low-frequency (ELF) range, which is invisible to the human eye.
* Electrical current: An alternating current with a frequency of 15Hz would cycle 15 times per second, which is very slow for typical household electricity.
Important Note: The meaning of 15Hz depends on the context. Different things oscillate or repeat at different rates.
