Can sound waves undergo diffraction around an edge?
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Q: Question 7
A:
Can sound waves undergo diffraction
around an edge?
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- The reason you can hear around Marge's hairdo is: The wavelength of sound is much longer than the obstacle's size O Sound cannot diffract because it is a transverse wave O The wavelength of sound is comparable to the obstacle's size Sound cannot diffract because it is a longitudinal wavePublic television station KQEDin San Francisco broadcasts a sinusoidal radio signal at a power of777 kW. Assume that the wave spreads out uniformly into a hemisphereabove the ground. At a home 5.00 km away from the antenna, what is the average density of the energy this wave carries?Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of 2.50 mW. If such a laser beam is projected onto a circular spot 3.00 mm in radius, what is its intensity? Provide the solution: W/m? --
- An automatic focus camera is able to focus objects using ultrasonic sound waves.The camera sends out sound waves that reflect ff distance objects and returns to the camera. A sensor detects the time it takes for the waves to return and then determines the distance of an objects from the camera. Id a sound wave with a speed of 340m/s returns to the camera after 0.150 sec, how far away is the object? Given? Asked? Solution?In a certain home sound system, two small speakers are located so that one is 80.0 cmcm closer to the listener than the other.For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of interference from two loudspeakers.You can hear the sound from a person talking on your right in both ears because (A) sound diffracts around an obstacle in its path (your head). (B) of constructive interference of the sound waves around your head. (C) of refraction of sound waves when they strike your right ear. (D) sound waves are pressure waves that exert a force on your ear drum.
- Q) Two plane monochromatic waves propagating in the same direction with amplitudes A and 2 A and differing in phase by π/3 rad superpose. Calculate the amplitude of the resultant wave.(D3) Sound QIVFN In most cases, the intensity (or loudness) of a sound decreases with increasing distance. If the sound wave is free to expand spherically, then the relationship between intensity and distance is as given in the diagram. Suppose the sound intensity 31 m from a jet engine is 95 W/m². Then find the intensity 56 m from the engine. Source or 1₁² = 1₂2 71 12 8. 1₁ 1₂ A. 33.92 W/m² D. 29.11 W/m² 35.18 W/m² B. 30.35 W/m² E. C. 31.53 W/m² F. 32.5 W/m² 1--1 QIVIG At the peak temperature on a sunny but cold day, the speed of sound in air was measured to be aboutTwo waves that destructively interfere, resulting in a net amplitude of zero, are how many degrees out of phase? 360 180 90 0
- In the figure, sound waves A and B, both of wavelength 12.0 m, are initially in phase and traveling rightward. They each reflect several times but end up traveling in their original direction. What is the second smallest value (m) of d that puts A and B exactly out of phase with each other after the reflections? A B d 2d |—a—A water bug on the surface of a pond bobs up and down three times per second on ripples with wavelength 10.5 cm. A fish resting at the surface of the pond is 8.5 m from the water bug. How long does it take a ripple passing the water bug to reach the fish?You are shouting in monotone voice with frequency of 440 Hz . Your friend is 300m away . If the temperature of the air is -15°C , bow many wavelength occur between you and your friend ?