2. Doppler Effect A bat glides along the positive x - axis (to the right) at a uniform velocity of 16.0 m/s while a rodent, which is to the right of the bat by a fair distance, runs towards the bat (in the leftward direction) at a uniform velocity of 4.00 m/s. The bat emits a sound wave at a frequency of 30.0 x 10 Hz. The wave will strike the rodent and perfectly reflect back towards the bat. What is the frequency of this echo as detected by the bat? Take the speed of sound to be 343 m/s