Homework 19 Solutions

Homework 19 Solutions - lim(kl9356 Homework 19...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
lim (kl9356) – 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 87 . 7 MHz on your FM radio dial? Correct answer: 3 . 42075 m. Explanation: Let : v = 3 × 10 5 km / s = 300 million m / s and f = 87 . 7 MHz = 87 . 7 million Hz . λ = v f = 300 million m / s 87 . 7 million Hz = 3 . 42075 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 41 . 6 vibrations in 34 . 9 s. Also, a given maximum travels 428 cm along the rope in 8 . 7 s. What is the wavelength? Correct answer: 41 . 2721 cm. Explanation: Given : n = 41 . 6 vibrations , t 1 = 34 . 9 s , Δ x = 428 cm , and t 2 = 8 . 7 s . The speed of the wave is v = Δ x t 2 and the frequency is f = n t 1 or T = t 1 n , so λ = v f = v 1 f = v T = Δ x t 2 t 1 n = (428 cm) (34 . 9 s) (8 . 7 s) (41 . 6) = 41 . 2721 cm .
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern