Solve the following question:
Question: You can excite waves in a string of length 1.142 m fixed at both ends. You started from an arbitrarily low frequency and increased it slowly. You found two successive harmonic standing waves of frequencies: 209.6 Hz and 233.8 Hz.
1- What is the speed of the wave in the medium in m/s?
Please use great detail in explaining the question. Thank you.