A microphone is moving in air toward a stationary source of sound (speed of sound = 343m/s). The detected frequency is 82.7Hz greater than the emitted frequency. When the microphone moves at the same speed toward the same stationary source in a liquid, the detected frequency is only 21.6Hz...
I'm really confused on this one too..
The intensity of the sound from a certain source is measured at two points along a line from the source. The points are separated by 13.1 m, the sound level is 71.30 dB at the first point and 63.20 dB at the second point. How far is the source from the...
The graph shows the US Department of Labor noise regulation for working without ear protection. A machinist is in an environment where the ambient sound level is of 85dB, i.e., corresponding to the 8 Hours/day noise level. The machinist likes to listen to music, and plays a Boom Box at an...
To verify her suspicion that a rock specimen is hollow, a geologist weighs the specimen in air and in water. She finds that the specimen weighs twice as much in air as it does in water. The solid part of the specimen has a density of 5.13×103kg/m3. What fraction of the specimen's apparent volume...