520_Physics ProblemsTechnical Physics

520_Physics ProblemsTechnical Physics - I I 2 1 = P17.58...

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522 Sound Waves ANSWERS TO EVEN PROBLEMS P17.2 143 . k m s P17.36 no P17.38 (a) 217 . cm s; (b) 2 000 028 9 . H z ; P17.4 (a) 27.2 s; (b) longer than 25.7 s, because the air is cooler (c) 2 000 057 8 . H z P17.6 (a) 153 m s; (b) 614 m P17.40 (a) 441 Hz; 439 Hz; (b) 54.0 dB P17.8 (a) 4.16 m; (b) 0 455 . s µ ; (c) 0.157 mm P17.42 (a) 325 m s; (b) 29 5 . ms P17.10 155 10 10 . × m P17.44 48 2 . ° P17.46 46 4 . ° P17.12 (a) 1 27 . Pa; (b) 170 Hz; (c) 2.00 m; (d) 340 m s P17.48 (a) 7; (b) and (c) see the solution P17.14 sx t =− × 22 5 62 8 2 16 10 4 .c o s .. nm ej P17.50 (a) 0642 . W ; (b) 0 004 28 0 428% .. = P17.16 (a) 4.63 mm; (b) 14 5 . ms ; P17.52 (a) 0 232 . m; (b) 84 1 . nm; (c) 13.8 mm (c) 473 10 9 . × Wm 2 P17.54 (a) 0515 . min; (b) 0614 .m i n P17.18 (a) 5 00 10 17 . × W; (b) 5 00 10 5 . × W P17.56 (a) 504 . km s; (b) 159 s µ P17.20 (a) 100 10 5 . × Wm 2 ; (b) 90 7 . mP a (d) 0.002 38; (e) 476 MPa; (f) see the solution P17.22 (a) I f f I 2 2 1 = F H G I K J ; (b)
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Unformatted text preview: I I 2 1 = P17.58 (a) see the solution; (b) 85 9 . Hz P17.60 The gap between bat and insect is closing at 1.69 m s. P17.24 21.2 W P17.26 (a) 4.51 times larger in water than in air and 18.0 times larger in iron; P17.62 (a) see the solution; (b) 0.343 m; (c) 0.303 m; (d) 0.383 m; (e) 1 03 . kHz (b) 5.60 times larger in water than in iron and 331 times larger in air; P17.64 80 0 . (c) 59.1 times larger in water than in air and 331 times larger in iron; P17.66 67 0 . dB (d) 0.331 m; 1.49 m; 5.95 m; 10.9 nm; 184 pm; 32.9 pm; 29.2 mPa; 1.73 Pa; 9.67 Pa P17.68 t eE d I = 4 1 2 10 P17.28 see the solution P17.70 see the solution P17.30 10.0 m; 100 m P17.72 ~10 11 Hz P17.32 86.6 m P17.34 (a) 1 76 . kJ; (b) 108 dB...
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