Sound Waves and Intensity Problems
Challenging physics problems involving sound waves, ocean depth calculation, radio wave wavelength determination, sound intensity calculations, and Doppler effect scenarios. Test your knowledge and problem-solving skills in the exciting world of wave physics.
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Presentation Transcript
A sonar echo returns to a boat in ocean 2.6 s after being emitted. What is the depth of the ocean at the location of the boat? (Assume that the speed of sound in ocean water is 1540 m/s).
What is the wavelength of the 96 MHz (M = 106) radio waves? Assume a speed of light o 3.0 x 108 m/s. Express the numeral of your answer in SI units with 3 or more significant figures.
Sound Intensity The sound intensity I is defined as the sound power P that passes perpendicularly through a surface divided by the area A of that surface: P. A 75 W speaker emits sound radially and uniformly in all directions. What will be the intensity of sound in W/m2at 3.5 m from this speaker?
16. What sound intensity level in dB is produced by earphones that create an intensity of ? I0 = 1
v v v . = o f f o s v s P34. A commuter train blows its 200-Hz horn as it approaches a crossing. The speed of sound is 335 m/s. (a) An observer waiting at the crossing receives a frequency of 208 Hz. What is the speed of the train? (b) What frequency does the observer receive as the train moves away?
