When Sasha enters a cave, she spotted a bat on her left and another one up front. They both produced supersonic waves of the same wavelength of 0.75 m. If the waves interfere destructively at her location, at which pair of distances should the two bats be located? Choices: r1 = 6.20 m, r2 = 1.75 m r1 = 10.40 m, r2 = 11.90 m r₁ = 3.50 m, r2 = 4.25 m r1 = 1.50 m. r2 = 9.00 m You

Transverse waves on a string have wave speed of 8.00 m/s, amplitude of 0.0700 m, and wavelength of 0.320 m. The waves travel in the _x-direction, and at t = 0 the x = 0 end of the string has its maximum upward displacement. Find the Find the transverse displacement of a particle at x = 0.360 m at time t = 0.150 s. 4.95 cm O 9.45cm O 5.49cm O 4.16cm

Two students are standing the same distance from a source of sound. The first student receives a power of 68 × 10-6 W in their eardrum. The second student receives σ = 1.2 times more power in their eardrum. What is the ratio of the diameters of the students eardrums?  d1/d2= If the second students eardrums have a diameter of d=1cm what was the intensity of the sound that the student heard in watts per square meter?  I=

Dolphins of the open ocean are classified as Type II Odontocetes (toothed whales). These animals use ultrasonic "clicks" with a frequency of about 55 kHz to navigate and find prey.  Suppose a dolphin sends out a series of clicks that are reflected back from the bottom of the ocean 90 m below. How much time elapses before the dolphin hears the echoes of the clicks? (The speed of sound in seawater is approximately 1530 m/s.) What is the wavelength of 55 kHz sound in the ocean?