In each of the four scenarios to the right, a large bat lets out a short burst o

Question

In each of the four scenarios to the right, a large bat lets out a short burst of ultrasonic sound, which the smaller bat hears a moment later. If the large bat flies at 15.20 m/s and the small bat flies at 2.540 m/s, rank the frequency that the smaller bat detects in the four scenarios, from highest to lowest. Assume that the speed of sound is 343.0 m/s.

In scenario C, some of the large bat's signal reflects off of the small bat and returns to the large bat, warning it of the smaller bat's presence. If the initial signal has a frequency of 40.20 kHz, what return frequency will the large bat detect? Calculate the final frequency to four significant figures.

Explanation / Answer

Frequency from hightest to lowest is        C , A , D , B b) frequency heard by the small bat is scenario c is         f ' = f (V + Vo) / (V- Vs)             = (40.2kHz) (343 + 2.54) / (343 - 15.2)            = 42.3755kHz The reflected wave heard by the large bat is           f '' = f ' (V+ Vo) / (V- Vs)                = (42.3755)(343 + 15.2) / (343 - 2.54)                = 44.5836kHz

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.