MasteringPhysics15

MasteringPhysics15 - MasteringPhysics: Assignment Print View

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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignmentI. .. 1 of 12 12/19/2007 1:00 PM [ Print View ] PHCC 141: Physics for Scientists and Engineers I - Fall 2007 15 Waves Due at 11:59pm on Monday, November 5, 2007 Hide Grading Details Number of answer attempts per question is: 5 You gain credit for: correctly answering a question in a Part, or correctly answering a question in a Hint. You lose credit for: exhausting all attempts or requesting the answer to a question in a Part or Hint, or incorrectly answering a question in a Part. Late submissions: reduce your score by 100% over each day late. Hints are helpful clues or simpler questions that guide you to the answer. Hints are not available for all questions. There is no penalty for leaving questions in Hints unanswered. Grading of Incorrect Answers For Multiple-Choice or True/False questions, you lose 100% / ( # of options - 1 ) credit per incorrect answer. For any other question, you lose 3% credit per incorrect answer. Wave Notation Learning Goal: To understand the relationships between the parameters that characterize a wave. It is of fundamental importance in many areas of physics to be able to deal with waves. This problem will lead you to understand the relationship of variables related to wave propagation: frequency, wavelength, velocity of propagation, and related variables. Note that these are kinematic variables that relate to the wave's propagation and do not depend on its amplitude. Part A Traveling waves propagate with a fixed speed usually denoted as (but sometimes ). The waves are called _______________ if their waveform repeats every time interval . ANSWER: periodic Periodic waves are characterized by a frequency that is designated by or . The quantities and are related to the length of the waves. The fundamental relationship among frequency, wavelength, and velocity is . This relationship may be visualized as follows: In 1 s, cycles of the wave move past an observer. In this same second the wavetrain moves a distance . Part B Solve this equation to find an expression for the wavelength . Express your answer in terms of the velocity and the frequency . ANSWER: = Part C If the velocity of the wave remains constant, then as the frequency of the wave is increased, the wavelength ___________. ANSWER: decreases Part D The difference between the frequency and the frequency is that is measured in cycles per second or hertz (abbreviated Hz) whereas the units for are _______ per second. Give your answer in one word. Watch your spelling to avoid a mistake!
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