The distance between two successive maxima of a transverse wave is 1.20 s, Eight crests, or maxima, pass a given point along the direction of travel every 12.0s.. Calculate the wave speed.
A piano emits frequencies that range from a low of about 28 Hz to a high of about 4200 Hz. Find the range of wavelenghts spanned by this instrument. The speed of sound in air is approximately 343 m/s.
2007-02-08 14:48:14 · 1 answers · asked by Kitana 2 in Science & Mathematics ➔ Physics
"8 crests pass a given point every 12 s" means one full wave takes 12/8 = 1.5 s to move pass that point.
So, the wave speed is 1.2 m / 1.5 s = 0.8 m / s.
The piano question is simply using
speed = frequency x wavelength. You substitude the 2 frequencies (one after another) and obtain 2 wavelengths.
2007-02-08 15:47:41 · answer #1 · answered by Physics tutor 1 · 0⤊ 1⤋