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frequency
frequency. which is measured in hertz (Hz) or per second (1/s)
Twenty times.
Wavelength times frequency gives the speed of the wave.
17/11x3=4.63636363636363636363636363636363636363(repeats forever)
frequency means how may times something repeats
frequency
2500 hz
frequency. which is measured in hertz (Hz) or per second (1/s)
"Fast time" doesn't really make much sense, and instead of "fast frequency" you would usually say "high frequency". Frequency means how often something repeats - in physics, this is measured in hertz, which means the same as cycles per second (or repetitions per second). A "high frequency" means that something repeats many times per second (or many times per day, or whatever unit you choose to use).
It is the periodicity. If measured in the number of cycles per second, it is the frequency, and the measurement unit is a Hertz (Hz).
49 mhz means 49 megahertz, which is a measure of frequency in waves. What this mean is that the wave form repeats itself 49,000,000 times each second.
Because that's how frequency is DEFINED. The frequency of any wave, including an EM one, can be described as the number of times per second that wave repeats an action. Thus, crests per second, or Hz. Just think about the word "frequency". It means "how frequent" or "how often". To describe how often something happens, you count how many times it happens in a week, a day, an hour, a minute, or ... if it's something that repeats very fast ... how many times it happens every second. That's exactly the meaning of the unit "Hertz" ... it means "per second".
A wave equation is an equation that repeats y-values infinately creating a wave like pattern, a good example is the sine wave: http://en.wikipedia.org/wiki/Sine_wave
Frequencyis the number of occurrences of a repeating event per unit time
19 Hz- Apex
Twenty times.