Physics, 09.04.2020 00:30 suzyleonardsl0
A small sphere of radius R is arranged to pulsate so that its radius varies in simple harmonic motion between a minimum of R-ΔR and a maximum of R+ΔR with frequency f. This produces sound waves in the surrounding air of density rho and bulk modulus B. a- Find the intensity of sound waves at the surface of the sphere. (The amplitude of oscillation of the sphere is the same as that of the air at the surface of the sphere.)b-Find the total acoustic power radiated by the spherec-At a distance d≫R from the center of the sphere, find the amplitude of the sound wave. d-At a distance d≫R from the center of the sphere, find the pressure amplitude of the sound wave. e-At a distance d≫R from the center of the sphere, find the intensity of the sound wave. Express your answer in terms of the variables R, x, f, and appropriate constants.
Answers: 3
Physics, 21.06.2019 23:00
Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)
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Physics, 22.06.2019 10:30
The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g
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Physics, 22.06.2019 12:40
Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)
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A small sphere of radius R is arranged to pulsate so that its radius varies in simple harmonic motio...
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