# Calculating Amplitude HELP!

1. Sep 28, 2008

### Butterfly_grl

I don't know if it's possible or not but I want to calculate the amplitude of a certain frequency. I Have the value of the frequency, the energy needed to give this frequency and say I can calculate the wavelength from the given frequency.... So Is it possible to calculate the amplitude?

Another thing could anyone please explain this simple wave equation for me and tell me how can I calculate the Amplitude (A) from it.

x=A sin(t - k) + b

What is t, k and b ( I found this equation on wikipedia)

Thanks

2. Sep 28, 2008

### marcusl

Is this a homework problem? It would be helpful to see how the problem is worded.

In your equation, A is the amplitude, t is a phase angle, k is an initial phase, and b is an amplitude offset.

A more commonly used form is
$$x(t)=Asin(2\pi ft+\phi)+b$$
where t now is time, f is frequency and $$\phi_0$$ is the phase offset. These equations describe oscillatory motion.

3. Sep 29, 2008

### Butterfly_grl

Well Unfortunately I'm working solo - On my own - It's not a homework
I just want a way to calculate the amplitude of the frequency

4. Sep 29, 2008

### marcusl

5. Apr 21, 2010