Decide whether each of the following statements are T-True, or F-False. (If the

Question

Decide whether each of the following statements are T-True, or F-False. (If the first is T and the rest are F, enter TFFF)  

A) As a wind instrument warms up, the resonant frequencies of the instrument tend to slightly decrease.
B) If the slide of a trombone is pushed outwards (making the effective tube length longer), all the resonant frequencies of the instrument decrease.
C) If you pluck a string one third of the way along its length, you tend to suppress the third harmonic (n=3).
D) If the air in a concert hall warms up, the resonant frequencies of the string instruments will change precisely the same as the resonant frequencies of the wind instruments.

Be careful to input your answer as a string of 4 Ts and Fs, in order. (No spaces or any other characters.)

Explanation / Answer

A. speed sound increases when air is warmed. If speed goes up, frequency increases

Statement A is FALSE

B. Wavelength increases with length. Frequency decreases with increasing of wavelength.

Statement B is FALSE.

C. If you pluck a string one third of the way along its length, you tend to suppress the third harmonic (n=3).

Statement C is TRUE

D. Strings slightly expand when its temperature increases, due to this its tension is reduced.

So frequency goes down, but not at the same rate.

Statement D is FALSE

ANSWER: F F T F

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