1. The problem statement, all variables and given/known data Do not attempt to do this experiment! You are sitting on railroad tracks, and extremely fast trains are approaching from both the left and the right. These trains have equal speeds, and both send out a warning signal with their horns. You hear this signal at a frequency which is 50% higher than the emitted frequency. Did I say that these trains went fast? How large is the change in frequency by the signal sent out by one train and observed by the machinist in the other? 2. Relevant equations f+=f0/1-Vs/V (approaching source) f-=f0/1+Vs/V) (receding source) f+=(1+V0/V)f0 (observer approaching a source) f-=1(-V0/V)f0 ( observer receding from a source) 3. The attempt at a solution I just need a little help getting started, I don't know where to go with this.