problem. 'emitted What frequency strikes the stalactite? stalactite= Hz The stalactite reflects what strikes it (NOT the original pitch). What frequency does the bat then hear coming from the stalactite? fbat = What is the frequency of beats heard by the bat? fbeat= Hz NOTE: The bat hears two things: • The original frequency emitted. • The "double doppler shifted" note from the stalactite Hz

2. Two waves sources release their own individual wave. One source releases a wave, while the second source sends an identical wave, but 2.5λ shifted. Which statement below is true? a. The waves will be in phase, and constructively interfere b. The waves will be in phase, a nd destructively interfere c. The waves will be out of phase, and constructively interfere d. The waves will be out of phase, and destructively interfere e. None of the above are true

When the temperature of a substance decreases, what happens to its molecules? O a. The molecules become smaller, contract and have less kinetic energy. O b. The molecules become larger, expands, and will have more kinetic energy. O. The molecules move faster, and have more kinetic energy. O d. The molecules become slower, and have less kinetic energy 7T -1 Consider a wave described by the wave function y (x,t) = 0.85m sin 5T 'x+s-t+), find the wavelength of wave? O a. 0.63 m O b. 0.36 m 1.6 m O d. 0.57 m

Group Problem Chapter 18 Two sinusoidal waves in a string are defined by the wave functions with x and y in cm (so k is in rad/cm) and t in s. yı(x,t) = 2.10 sin (18.0x – 31.0t) y2(x,t) = 2.10 sin (30.0x – 45.0t) a) What is the phase difference between these two waves at the point x1=5.00cm and tj=2.00s? (Pick an angle between 0° and 360°.) b) What is the positive x value closest to the origin for which the two arguments differ by +(2n+1)n at t1? At that location the two waves destructively interfere. (Hint: it's not the n=0 case!)

Superposition and Standing Waves A standing wave occurs when two travelling waves with the same wavelength and wave speed pass through each other in opposite directions. Mathematically the first wave is written as: Y, (x, t) = A cos(kx – wt) and the second wave: Y,(x, t) = A cos(kx + wt) where the wave number, k = 2/2, the natural frequency w = 27/r, and A and T are the wavelength and period of the waves, respectively. The positive and negative signs of w show that the waves are travelling in opposite directions. Demonstrate that the sum of these two waves, Ysum = Y1 + Y2, results in a sinusoidal wave, Y(x) with a wavelength A and an amplitude that is twice that of each wave individually. Furthermore, as time advances, the amplitude is oscillating between +A and -A with a period, T. Repeat the summation, only now assume the other harmonic wave form: Y, (x, t) = A sin(kx – wt) and the second wave: Y2(x, t) = A sin(kx + wt) The following trigonometric identities may be helpful: sin(a +…

Question 7 Chapter 5 Homewo X + education.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnec X Co Course: PHSC1001.25: Physical Sc X omework 3 attempts left Hz Check my work Saved Note that the smaller frequency is subtracted from the larger one to avoid negative beats. A tone with a frequency of 409 Hz is sounded at the same time as a 437 Hz tone. What is the beat frequency?

help please

Waves and Sound Physics  Recently a company built a factory near your home. One windy day while walking past the factory you notice a very low pitch sound resonating from the smokestack attached to the factory. You conclude that the sound is the result of air column resonance resembling an air column open at one end (the top of the chimney) and closed at the other end (the bottom of the chimney where the furnace is located). Checking with the weather app on your phone you determine the air temperature to be 15 °C. You also recall reading in your local newspaper that the height of the smokestack is 12 m. Doing some quick mental calculations you determine the resonant sound to be the result of the 3rd overtone standing wave pattern within the air column.     1. What pitch of sound are you hearing as you walk past the factory? 2. Which harmonic does the pitch represent? Given information: the speed of sound in air based on the air temperature provided is 340m/s.

Macmillan Learning A sinusoidal transverse wave travels along a long, stretched string. The amplitude of this wave is 0.0825 m, its frequency is 4.17 Hz, and its wavelength is 1.15 m. What is the shortest transverse distance d between a maximum and a minimum of the wave? d = How much time At is required for 78.1 cycles of the wave to pass a stationary observer? At = Viewing the whole wave at any instant, how many cycles N are there in a 35.7 m length of string? N = m cycles W

Two rocks are simultaneously dropped into a pond, creating the ripples shown. As they overlap, the ripples interfere. At the point marked with a dot, A. The interference is constructive. B. The interference is destructive. C. The interference is somewhere between constructive and destructive. D. There's not enough information to tell about the interference. What is the extra distance As traveled by one wave to the dot compared to the other? Α. Ο C. A 31 D. F. 4 5A B. E. 21 R, R, R I2 I3 Select all loop rules that apply to this circuit. SELECT ALL THAT APPLY A. 0 = -V +1,R2 – 1R1 B. 0 = V2 – 13R3- lR2 – Vị C. 0 = 4R1 – V2 – I3R3 D. 0 = -V – 1R2 + I¼R1 E. 0 = -V2 – I3R3 + 1½R2 +V1 F. 0 = 1, R, +V2 + I,R3 G. 0 = -V +I,R2 + I,Rq H. 0 = V2 + I3R3 + 1,R2 – V1 I. 0 = 1,R1 - V2 + I3R3 J. 0 = -V- I½R2 + I, R1 K. 0 = -V2 + I3R3 + 12R2 - V2 L. 0 = -1,R – V½ – 13R3 wwT ww