This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: lim (kl9356) Homework 20 Weathers (17104) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points It is found that a 6 . 1 m segment of a long string contains 3 complete wavelengths and has a mass of 190 g. At one point it is vibrat- ing sinusoidally with a frequency of 55 Hz and a peak to valley displacement of 0 . 8 m. What power is being transmitted along the string? Answer in units of W. 002 (part 1 of 2) 10.0 points A point source emits sound waves with an average power output of 1 . 24 W. Find the intensity 3 . 15 m from the source. Answer in units of W / m 2 . 003 (part 2 of 2) 10.0 points Find the distance at which the sound reduces to a level of 64 dB. Answer in units of m. 004 (part 1 of 2) 10.0 points A skyrocket explodes 121 m above the ground. Three observers are spaced 77 m apart, with observer A directly under the point of the explosion....
View Full Document