Question $26$

What can you say about standing waves created in the lab for the steel spring?

$($a$)$ There are three maxima in the third harmonic standing wave.

$($b$)$ You can create standing waves by wiggling the steel spring up and down at any frequency as long as you wiggle it hard enough.

$($c$)$ The velocity of the wave travelling in the steel spring can be determined from the speed of sound at room temperature.

$($d$)$ The standing wave in the steel spring is formed by the interference of two waves travelling in the same direction with the same frequency.

$($e$)$ The lowest frequency standing wave correspond to one wavelength that just fits between two ends.