Question

Item 7
What aspect of an instrument does a musician control to play a particular musical note?

velocity of the sound wave

frequency of the sound wave

resonant frequency of the standing wave

length of the air column or string

Answer 1

I would say my response but I’m not sure at all with this one :/

Answer 2

You can answer this without having to know much physics.

Do you by chance play a string instrument or the piano? Notice that the strings are of the same length and they do not propagate (i.e., that is, when you struck the string, the string doesn't travel). They rather work as a 'standing' wave.

Standing waves are the essence of music. Different frequencies of standing waves yield different sounds, and all the possible standing waves end up becoming the simple harmonic motion (i.e., first harmonic).

Answer 3

oh okay, so it would be C then?

Answer 4

resonant frequency of the standing wave?

Answer 5

yes

Answer 6

it was actually d ,but thank you for your help

Answer 7

OH I'm really sorry, I did a hasty mistake; I saw 'standing wave' and shot right to it without reading option D :(

D would be the better answer because that impacts the frequencies of the SHM

Sorry if it costed you a mark :/ that's why we should go through every option xD

Answer 8

D is also only referring to a standing wave, because the length of the string will impact a standing wave, not a transfer wave. Transfer waves propagate, but standing waves have antinodes and [/i]nodes[/i] that form the basics of SHM. The number of antinodes and nodes change the tones of strings.