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Chapter 11: 11-36P (page 292)
A sound wave in air has a frequency of 282 Hz and travels with a speed of 343 m/s. How far apart are the wave crests (compressions)?
The wave crests (compressions) are \(1.22\;\;{\rm{m}}\)apart.
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The speed of waves on a string is \({\bf{97}}{\rm{ }}{\bf{m}}{\rm{/}}{\bf{s}}\).If the frequency of standing waves is 475 Hz, how far apart are two adjacent nodes?
A 62 kg person jumps from a window to a fire net 20.0 m directly below, which stretches the net 1.4 m. Assume that the net behaves like a simple spring. (a) Calculate how much it would stretch if the same person were lying in it. (b) How much would it stretch if the person jumped from 38 m?
Why is it incorrect to think that the more digits you include in your answer, the more accurate it is?
Express the following using the prefixes of Table 1–4:
(a) \({\bf{1 \times 1}}{{\bf{0}}^{\bf{6}}}\;{\bf{volts}}\)
(b) \({\bf{2 \times 1}}{{\bf{0}}^{{\bf{ - 6}}}}\;{\bf{meters}}\)
(c) \({\bf{6 \times 1}}{{\bf{0}}^{\bf{3}}}\;{\bf{days}}\)
(d) \({\bf{18 \times 1}}{{\bf{0}}^{\bf{2}}}\;{\bf{bucks}}\)
(e) \({\bf{7 \times 1}}{{\bf{0}}^{{\bf{ - 7}}}}\;{\bf{seconds}}\)
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