ou are driving down the road at 15.6 m/s (35 mph ) when an ambulance passes you with its siren blaring. the ambulance siren produces a frequency of 700 hz . as the ambulance approaches you from behind, you hear a frequency of 740 hz . the speed of sound in air is 344 m/s . part a what is the speed of the ambulance? the positive direction points from your car (listener) toward the ambulance (source). express your answer in meters per second. activate to select the appropriates template from the following choices. operate up and down arrow for selection and press enter to choose the input value typeactivate to select the appropriates symbol from the following choices. operate up and down arrow for selection and press enter to choose the input value type v