physics question - sound waves

[naphthalene]

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Hi,

I have from the kaplan book.
"A child is practicing the 2nd harmonic on clarinet. If his brother covers one end of the clarinet for a brief second, how will the sound change?"

In the answer, it says that "your task is to determine how the frequency of a 2nd harmonic differs between a pipe that is open at both ends from one that is open at only one end."

Aren't we trying to find the difference between a pipe that is open at one end,closed at another and one that is closed at both? Because a clarinet is open/closed pipe while the flute is both open....

Even though this did not affect the answer choice, but the explanation did not make much sense.
Thanks

 

[golgiapparatus88]

Hi,

I have from the kaplan book.
"A child is practicing the 2nd harmonic on clarinet. If his brother covers one end of the clarinet for a brief second, how will the sound change?"

In the answer, it says that "your task is to determine how the frequency of a 2nd harmonic differs between a pipe that is open at both ends from one that is open at only one end."

Aren't we trying to find the difference between a pipe that is open at one end,closed at another and one that is closed at both? Because a clarinet is open/closed pipe while the flute is both open....

Even though this did not affect the answer choice, but the explanation did not make much sense.
Thanks

Your reasoning is correct. Can you give the answer choices and maybe more of the explanation. This is a weird question because a clarinet (closed/open) doesn't have n=2. Remember closed at one end is f=nv/4L where n=1,3,5 and open is f=nv/2L where n=1,2,3.