Here is a link to Desmos Here is another formula that we use…

Here is a link to Desmos Here is another formula that we used that is slightly different than the one in the formula sheet above   a) If you sound a horn that has a frequency of 200 Hz and a wavelength of 1.5m and you are 250m from a cliff, how long would it take for you to hear the echo?   b) What would be the period of the above wave?   c) Is that sound wave moving at a realistic speed?  Explain how you know.