Fr = ((Vs-Vr)/(Vs+Vb))*Fb
Fr = ((343-0)/(343+Vb))*80 = 76 kHz
(343/(343+Vb))*80 = 76
27,440/(343+Vb) = 76
26,068+76Vb = 27,440
76Vb = 27440 - 26,068 = 1372
Vb = 18 m/s. = Velocity of the bat.
The bat is receding, because the freq.
heard is lower than the freq. emitted by the bat.
A bat watcher detects the sound of a hunting greater horseshoe bat at 76 kHz . She knows
that this species produces echolocation calls at 80 kHz . What is the speed of this bat with respect to the batwatcher? Is the bat receding or approaching?
1 answer
1 answer