Cracking the SAT Physics Subject Test

This shows that the length of the string is equal to 4( λ), so

This is the fourth-harmonic standing wave, with wavelength λ 4 (because the

expression above matches λn = 2L/n for n = 4). Since L = 12 m, the wavelength is

Questions 8-9

A piano tuner causes a piano string to vibrate. He then loosens the

string a little, decreasing its tension, without changing the length of

the string.

8. What happens to the fundamental frequency?


9. What happens to the fundamental wavelength?