What are the differences between wavefront and wavelet?
The noise from an airplane engine 25.0 m from an observer is found to have an intensity of 45.0 dB. What will be the intensity in decibel when the plane flies overhead at an altitude of 2.0 Km?
An organ pipe is tuned to a frequency of 440 Hz when the temperature is 27°C. Find its frequency when the temperature drops to 0°C. Assume both ends of the pipe open.
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