What units are used to describe frequency, or vibrations per second? meters
decibels
pitch
hertz

hertz

Explanation:

Usually frequency is measured in the hertz unit, named in honor of the 19th-century German physicist Heinrich Rudolf Hertz. The hertz measurement, abbreviated Hz, is the number of waves that pass by per second. For example, an "A" note on a violin string vibrates at about 440 Hz (440 vibrations per second).

question: energy distribution provides utilities, which are

answer: electrical utility industry is a major provider of energy in most countries.

explanation: they use this energy for company's so they distribute this to companies in other companies

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(jacemorris)