Here we describe classroom-based procedures aiming at the estimation of the speed of sound in different gas mixtures with the help of a plastic drain pipe and two iPhones or iPod touches. The procedures were conceived to be performed with simple and readily available tools.
REFERENCES
1.
D.
Halliday
, R.
Resnick
, and J.
Walker
, Fundamentals of Physics
, 8th ed., Vol. 1
(Wiley
).2.
N. I.
Koshkin
, and M. G.
Shirkevich
, Handbook of Elementary Physics
(Mir Publishers
, Moscow
, 1977
), p. 45
.3.
Download at https://itunes.apple.com/us/app/acoustic-ruler-pro/id475081963?mt=8 (08/2013). The cost is 1.99.
4.
The developer of the app reports, for a quiet setting in dual-device mode, an uncertainty on distance of ± 1 cm with a range of 25 m.
© 2013 American Association of Physics Teachers.
2013
American Association of Physics Teachers
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