A 1.0 W point source emits sound waves isotropically. Assuming that the energy of the waves is conserved, find the intensity, 2.5 m from the source. Show your solution and answer for the intensity 2.5 m from the source.
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- Express the following in W/m² : 80 dBQ3: A 1.0 W point source emits sound waves isotopically. Assuming that the energy of the waves is conserved, find the intensity (a) 1.0 m from the source and (b) 2.5 m from the source. (Hint: the area of the sphere is 4ar')A speaker-driver supplies W watts of power to waves traveling on an elastic sheet. As these waves travel outward in circular ripples, the intensity of the wave at a radius of 10 cm. is 5 W/cm. The power emitted by the source is
- Sound waves can be modeled as a spherical plane wave. For radial distances of 0.75 m, 2.5 m, and 5.5m, for a horn of 200 W, determine the inensities at each of these locations.A group of hikers hears an echo 1.00 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 342 m/s.) mTwo progressive waves y (x, t) = A sin( 4 x – ot) and y2(x, t) = A sin(4x - - - ) travel in the same direction. Calculate the speed of the wave produced as a result of interference of these two waves. Take A = 5 cm, 1 = 4 m and w = 31.4 Hz. Provide your answer in Sl units.
- An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530 m/s in seawater. How deep is the water directly below the vessel if the time delay of the echo to the ocean floor and back is 8 s?A weather emergency siren is mounted on a tower, 153 m above the ground. On one hand, it would be a good idea to make the siren very loud so that it will warn as many people as possible. On the other hand, safety regulations prohibit the siren from exceeding an intensity level of 101 dB for workers standing on the ground directly below the siren. Assuming that the sound is uniformly emitted, what is the maximum power that the siren can put out? maximium power output: W * TOOLS х10 How far away from the bas and still be able to hear the siren? Neglect any absorption of sound energy by the air; although, in reality, such absorption would be significant at long distances. maximum audible distance: mA group of hikers hears an echo 2.60 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 349 m/s.) m