Author Question: An organ pipe of length L that is open at one end resonates in its third harmonic with a wavelength ... (Read 63 times)

tiara099 · **on:** Jul 29, 2018

An organ pipe of length L that is open at one end resonates in its third harmonic with a wavelength of 2L/3. Is the other end of the pipe closed or open?

A) closed
B) open
C) We cannot tell from the information provided.

Question 2

A crying baby emits sound with an intensity of 8.0 10-8 W/m2. Calculate a reasonable estimate for the intensity level from a set of quintuplets (five babies),

all crying simultaneously at the same place? The lowest detectable intensity is 1.0 10-12 W/m2.
A) 79 dB
B) 69 dB
C) 56 dB
D) 49 dB
E) 36 dB