Any process that is repetitive or periodic has an associated frequency. The frequency is the number of repetitions, or cycles, during a given time interval. The inverse of the frequency is called the period of the process. Pendulums, as in a...

n. The quantity representing the number of complete cycles (sense 1) (oscillations) performed by a given wave per unit time, commonly expressed in Hertz (Hz) and represented by the symbol f. For example, a vibrating violin string that is making 400...

The term frequency is encountered in everyday talk with reference to the number of times that something repeats or recurs; in PSYCHOPHYSICS, frequency is used to indicate the number of vibrations of cycles per unit time—it typically refers to the...

The number of complete cycles in a wave’s motion that pass a given point per unit of time. For the higher-frequency energy types the unit of measurement is the HERTZ (symbol Hz) with 1 Hz equating to 1 cycle per second. See also:...

Sinusoidal waves of various frequencies; the bottom waves have higher frequencies than those above. Frequency is a measure of the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. if...

An Erie cancer researcher has found a way to burn salt water, a novel invention that is being touted by one chemist as the "most remarkable" water science discovery in a century.John Kanzius happened upon the discovery accidentally when he tried to desalinate seawater with...

The Japanese government gave licenses Friday for future high-speed wireless Internet services to KDDI Corp. and Willcom Inc., which is owned by U.S. investment fund Carlyle Group.The decision for the 2.5 gigahertz broadband WiMax services is a victory for the telecommunications companies and a defeat...

So, did Mike Bloomberg rule out at 2008 presidential bid on Dan Rather’s new HDNet show last night? You might just as well ask the age-old “If a tree falls in the woods…” question, since nobody I know seems to have HDNet-TV – or even...

The federal government wants to extend by five years its rules allowing the Navy to use a new low-frequency sonar, despite objections from environmentalists that the technology may harm whales and dolphins.The National Oceanic and Atmospheric Administration said Tuesday that the low-frequency active sonar used...