frequency for apex learners not speed :)
Frequency.
Speed for people taking apex
Here is an equation that relates three quantities of any wave: speed = frequency x wavelength. However, I am pretty sure that usually, you'll have to somehow measure the speed of the wave, instead of calculating it. In other words, you would measure the speed and the frequency, and then use the formula to calculate the wavelength; or measure the speed and wavelength, and use the formula to calculate the frequency.
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
Since the speed of the wave is equal to the wavelength times the frequency, all you need to do is divide the speed by the wavelength in this case.
Convert the cm to meters, to have compatible units. Then use the fact that the frequency times the wavelength is equal to the speed of the wave. In this case, you can divide the speed by the wavelength, to get the frequency.
That would depend what information is available. One common equation is: speed = wavelength x frequency. However, in a practical situation, it may be easier to actually measure the wavelength and (for example) the frequency, and then make deductions about the wavelength, than the other way round.
The speed or velocity of a wave is equal to the wavelength times the frequency. The period (amount of time for one wavelength to occur) is equal to 1 over the frequency (the inverse of its frequency).
Wave speed wavelength times frequency.
Here is an equation that relates three quantities of any wave: speed = frequency x wavelength. However, I am pretty sure that usually, you'll have to somehow measure the speed of the wave, instead of calculating it. In other words, you would measure the speed and the frequency, and then use the formula to calculate the wavelength; or measure the speed and wavelength, and use the formula to calculate the frequency.
wavelength
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
Divide the speed by the wavelength. (For any wave, the wavelength times the frequency is equal to the speed of the wave.)
The product of (wavelength) times (frequency) is equal to the speed of the wave.
Frequency.
(wavelength) x (frequency) = wave speed
Since the speed of the wave is equal to the wavelength times the frequency, all you need to do is divide the speed by the wavelength in this case.
Convert the cm to meters, to have compatible units. Then use the fact that the frequency times the wavelength is equal to the speed of the wave. In this case, you can divide the speed by the wavelength, to get the frequency.
That would depend what information is available. One common equation is: speed = wavelength x frequency. However, in a practical situation, it may be easier to actually measure the wavelength and (for example) the frequency, and then make deductions about the wavelength, than the other way round.