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Physics Frequency Question.?
A string that is fixed at both ends has a length of 1.48 m. When the string vibrates at a frequency of 70.3 Hz, a standing wave with five loops is formed. (a) What is the wavelength of the waves that travel on the string? (b) What is the speed of the waves? (c) What is the fundamental frequency of the string?
Please include units and workings where possible.
Will happily award a best answer :)
1 Answer
- oldschoolLv 73 years agoFavorite Answer
5 loops is 5 half wavelengths so 1.48 = 5λ/2 -----> λ = 2*1.48/5 = 0.592m
λf = v = 0.592*70.3 = 41.6m/s
λo/2 = 1.48 ----->λo = 2.96 -----> fo = v/λo = 41.6/2.96 = 14.05Hz or 14.1Hz to 3 s.f.
