1. The problem statement, all variables and given/known data (a) A siren emits a frequency of 900 Hz. Wind is blowing at a steady speed of 15.0 ms-1. The speed of sound in calm air is 343 ms-1. What is the frequency heard by someone approaching at 15.0 ms¹, (i) when the wind blows from the person to the siren, (ii) when the wind blows from the siren to the person? 2. Relevant equations f'=(1+v_o/v) 3. The attempt at a solution i figured out the relative velocity of the sound (for i 343-15) and then subbed into the formula which became 1+15/328=1.04573HZ. I'm pretty sure this isnt right because the frequency should get higher but mine inst even close.... also i didnt use the given frequency at all????????