Pipin' pete is playing at city park next weekend. one of the closed-end pipes is capable of sounding out a first harmonic of 349.2 hz. the speed of sound in the pipe is 350 m/sec. find the length of the air column inside the pipe. give your answer in meters.

The frequency of the first harmonic in the pipe is

and the speed of sound in the pipe is

So the wavelength of the first harmonic in the pipe is


For a closed-end pipe, the wavelength of the first harmonic is four times the length of the pipe:

Therefore, the length of the pipe is

The masses of the objects and their densities

The answer is  a.first and third quarters