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.
PREPOSITIONS. Prepositions are words which begin prepositional phrases. A prepositional phrase is a group of words containing a preposition, a noun or pronoun object of the preposition, and any modifiers of the object.A preposition sits in front of (is pre-positioned before) its object.The following words are the most commonly used prepositions: about.below.tore is the object of the preposition to, not the direct object of the verb drove. Car is the direct object of the verb drove. To the grocery store is a prepositional phrase. NOTE: A word that looks like a preposition but is actually part of a verb is called a particle.