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Chapter 11: 11-53P (page 292)
If two successive overtones of a vibrating string are 280 Hz and 350 Hz, what is the frequency of the fundamental?
The fundamental frequency is found as \(70{\rm{ Hz}}\).
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If a violin string vibrates at 440 Hz as its fundamental frequency, what are the frequencies of the first four harmonics?
Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s due to human reaction time at the start a d stop moments. What is the percent uncertainty of a hand-timed measurement of (a) 5.5 s, (b) 55 s, (c) 5.5 min?
A 0.40-kg cord is stretched between two supports, 8.7 m apart. When one support is struck by a hammer, a transverse wave travels down the cord and reaches the other support in 0.85 s. What is the tension in the cord?
One hectare is defined as \({\bf{1 \times 1}}{{\bf{0}}^{\bf{4}}}\;{{\bf{m}}^{\bf{2}}}\). One acre is \({\bf{4}}{\bf{.356 \times 1}}{{\bf{0}}^{\bf{4}}}\;{\bf{f}}{{\bf{t}}^{\bf{2}}}\). How many acres are there in one hectare?
A cord of mass 0.65 kg is stretched between two supports 8.0 m apart. If the tension in the cord is 120 N, how long will it take a pulse to travel from one support to the other?
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