Hertz measures cycles per second - one Hertz is one cycle per second. Unlike gauss that is a measurement unit for the strenght of a specific thing (an electromagnetic field), hertz is a generic frequency measurement.
Prepend is a word that means to attach content as a prefix. It is often used in different kinds of programming and in automated processes. Some prepending is done manually as a user. For example, a prepend command could be used in a scripting language that a programmer would enter into a certain function or code module. It would add certain characters of text to the beginning of some variable or object.
To prepend a number means to add something to the beginning of the number for example, you have an eight hundred number stored in your contacts e.g.   800-111-1111 and eveâ¦ry time you call the call doesn't go through because when you entered the number you forgot to put a 1 in front of the 800.