Repeat this problem, but assume the ambulance and car are going the same direction, with the ambu- lance initially behind the car. the speeds and the frequency of the siren are the same as in the example. find the fre- quency heard by the observer in the car (a) before and (b) after the ambulance passes the car. note:

A) acceleration. this seems to be the one that makes sense.

Answer(b) 60 miles per hour;

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.