{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Waves_HW_File - Waves Homework Problems Michael Fowler 1...

Info icon This preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: Waves Homework Problems Michael Fowler 3/29/07 1. Sketch the appearance of a single transverse wave pulse traveling down a string at some instant, and below it sketch the velocit ies of the small segments of string at that same instant. 2. Given that the note middle C corresponds to a frequency of 262 Hz., find the length of an organ pipe having this as its fundamental (lowest frequency) note (a) if both ends of the pipe are open (b) if one end is closed, one end open. (c) What note would the organ pipe sound if filled with helium gas? (the bulk modulus is the same as for air). 3. Humans can only hear sounds in the frequency range 20 Hz to 20,000 Hz. What would be the lo ngest and shortest organ pipes there is any po int in manufacturing? 4. The speed of sound in water is about 1.5 km/sec. (a) Figure out from that the bulk modulus of water. (b) How compressed in vo lume is the water at the bottom of the deepest ocean? 5. A piston (a speaker) at one end of a long tube is oscillat ing at 262 Hz with an amplitude of 0.2mm. The piston is circular, with a diameter 5 cm. (a) Find the maximum pressure variat ion at the plate. (b) What is the average power output of the plate? (c) How much energy is there in one meter of the traveling wave as it goes down the tube? 6. Assume a steel piano wire is 50 cm long and weighs 3 grams. It is held at a tension of 1,000N. (a) What is its fundamental frequency? (b) What is the wavelength of that sound in air? (c) How does the speed of a traveling wave in the steel piano wire co mpare to the speed of sound in air? The speed of sound in so lid steel is far greater than the speed of sound in air. Does that contradict your finding for the wire? Explain why or why not. 7. A string under tensio n is pulled aside in the middle so it has the fo llowing V­shape: Describe with a series of sketches the subsequent mot ion of the string. (Hint: study the spreadsheet addit ion of two traveling sine waves to form a standing wave. The init ial string configurat ion here is half a wave length of a zigzag wave.) ...
View Full 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