Final Exam Help

  1. Final Exam Help!!!

    Question 27 Multiple Choice 2 points
    By what factor should the length of a simple pendulum be changed in order to triple the period of vibration?
    3
    6
    9
    27



    Question 28 Multiple Choice 2 points

    Each compression in the waveform of the longitudinal wave shown above corresponds to what feature of the transverse wave below it?
    wavelength
    crests
    troughs
    amplitude



    Question 29 Multiple Choice 2 points
    Each stretched region in the waveform of the longitudinal wave shown above corresponds to what feature of the transverse wave below it?
    wavelength
    crests
    troughs
    amplitude



    Question 30 Multiple Choice 2 points
    Which of the following most affects the wavelength of a mechanical wave moving through a medium? Assume that the frequency of the wave remains constant.
    the nature of the medium
    the amplitude
    the height of a crest
    the energy carried by the wave



    Question 31 Multiple Choice 2 points
    Suppose that two sound waves passing through the same medium have different wavelengths. Which of the following is most likely to be the reason for the differing wavelengths?
    the nature of the medium
    differences in amplitude
    differences in frequency
    the type of wave



    Question 32 Multiple Choice 2 points
    When two mechanical waves coincide, the amplitude of the resultant wave is always ____ the amplitudes of each wave alone.
    greater than
    less than
    the sum of
    the same as



    Question 33 Multiple Choice 2 points
    Sound waves
    are a part of the electromagnetic spectrum.
    do not require a medium for transmission.
    are longitudinal waves.
    are transverse waves.



    Question 34 Multiple Choice 2 points
    Which of the following is the region of a sound wave in which the density and pressure are greater than normal?
    rarefaction
    compression
    amplitude
    wavelength



    Question 35 Multiple Choice 2 points
    Of the following materials, sound waves travel fastest through
    helium at 0°C.
    air at 0°C.
    copper at 0°C.
    air at 100°C.



    Question 36 Multiple Choice 2 points
    In general, sound travels faster through
    solids than through gases.
    gases than through solids.
    gases than through liquids.
    empty space than through matter.



    Question 37 Multiple Choice 2 points
    A train moves down the track toward an observer. The sound from the train, as heard by the observer, is ____ the sound heard by a passenger on the train.
    the same as
    a different timbre than
    higher in pitch than
    lower in pitch than



    Question 38 Multiple Choice 2 points
    The Doppler effect occurs with
    only sound waves.
    only transverse waves.
    only water waves.
    all waves.



    Question 39 Multiple Choice 2 points
    At a distance of 3 m, the intensity of a sound will be ____ the intensity it was at a distance of 1 m.
    one-ninth
    one-third
    3 times
    9 times



    Question 40 Multiple Choice 2 points
    The intensity of a sound at any distance from the source is directly proportional to the sound's
    wavelength.
    pitch.
    power.
    frequency.



    Question 41 Multiple Choice 2 points
    When the frequency of a force applied to a system matches the natural frequency of vibration of the system, ____ occurs.
    damped vibration
    random vibration
    timbre
    resonance



    Question 42 Multiple Choice 2 points
    The Tacoma Narrows bridge collapsed in 1940 when winds caused ____ to build up in the bridge.
    a compression wave
    a longitudinal wave
    a standing wave
    friction



    Question 43 Multiple Choice 2 points
    If a guitar string has a fundamental frequency of 500 Hz, what is the frequency of its second harmonic?
    250 Hz
    750 Hz
    1000 Hz
    2000 Hz



    Question 44 Multiple Choice 2 points
    Four beats per second are heard when two notes are sounded. The frequency of one note is 420 Hz. Which of the following is a possible frequency of the other note?
    418 Hz
    105 Hz
    416 Hz
    1680 Hz



    Question 45 Essay 4 points
    A 0.10 kg piece of copper at an initial temperature of 95°C is dropped into 0.20 kg of water contained in a 0.28 kg aluminum calorimeter. The water and calorimeter are initially at 15°C. What is the final temperature of the system when it reaches equilibrium?
     
    Last edited: Jul 21, 2006
  2. jcsd
  3. Math Is Hard

    Math Is Hard 4,915
    Staff Emeritus
    Science Advisor
    Gold Member

    er... you posted a link to Blackboard at the bottom. Are you in the middle of taking your final exam for a distance learning course?
     
  4. No sorry that was a link i had copied so it went straight to my page when i pasted the rest of the information
     
  5. Moonbear

    Moonbear 12,265
    Staff Emeritus
    Science Advisor
    Gold Member

    We do not give "help" in the form of answers to your final exams. Those you have to do on your own.
     
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