19 - roofner(bar784 – Homework 19 – Weathers –(17104...

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Unformatted text preview: roofner (bar784) – Homework 19 – Weathers – (17104) 1 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Radio waves travel at the speed of light: 3 × 10 5 km / s. What is the wavelength of radio waves re- ceived at 98 . 3 MHz on your FM radio dial? Correct answer: 3 . 05188 m. Explanation: Let : v = 3 × 10 5 km / s = 300 million m / s and f = 98 . 3 MHz = 98 . 3 million Hz . λ = v f = 300 million m / s 98 . 3 million Hz = 3 . 05188 m . keywords: 002 10.0 points A harmonic wave is traveling along a rope. It is observed that the oscillator that generates the wave completes 37 . 4 vibrations in 26 . 9 s. Also, a given maximum travels 429 cm along the rope in 11 . 2 s. What is the wavelength? Correct answer: 27 . 5499 cm. Explanation: Given : n = 37 . 4 vibrations , t 1 = 26 . 9 s , Δ x = 429 cm , and t 2 = 11 . 2 s ....
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This document was uploaded on 10/26/2011 for the course PHYS 1710 at North Texas.

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19 - roofner(bar784 – Homework 19 – Weathers –(17104...

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