Types of Waves
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Questions and Answers

What is the direction of oscillations in longitudinal waves?

  • At an angle to the direction of wave travel
  • Opposite to the direction of wave travel
  • Along the direction of wave travel (correct)
  • Perpendicular to the direction of wave travel

    • What is the amplitude of a wave?

  • The maximum displacement of the wave from the equilibrium position (correct)
  • The wavelength of the wave
  • The distance between successive peaks
  • The frequency of the wave

    • What is the wavelength of a wave?

  • The frequency of the wave
  • The maximum displacement of the wave from the equilibrium position
  • The distance between successive 'like' points on a wave (correct)
  • The distance between successive peaks

    • Which type of wave has oscillations perpendicular to the direction of wave travel?

    <p>Transverse wave</p> Signup and view all the answers

    What is a common example of a longitudinal wave?

    <p>Sound wave</p> Signup and view all the answers

    What is the definition of a wave?

    <p>A disturbance that propagates from one place to another</p> Signup and view all the answers

    What is the main characteristic of sound intensity?

    <p>The amount of energy that passes through a given area in a given time</p> Signup and view all the answers

    What is the SI unit of sound intensity?

    <p>Watt per meter squared</p> Signup and view all the answers

    How does sound intensity from a point source change with distance?

    <p>It decreases as the square of the distance</p> Signup and view all the answers

    What is the application of sound intensity in biology?

    <p>Echolocation in bats</p> Signup and view all the answers

    What is the principle behind sonar?

    <p>Underwater reflection of sound waves</p> Signup and view all the answers

    What is the term used to describe the process of sound waves being sent and reflected through water?

    <p>Underwater echolocation</p> Signup and view all the answers

    What is the change in pitch of a sound when the source and observer are moving relative to each other?

    <p>The Doppler effect</p> Signup and view all the answers

    What is the unit of sound intensity level?

    <p>Decibel (dB)</p> Signup and view all the answers

    How much does the intensity of a sound increase with each increase in intensity level of 10 dB?

    <p>It doubles</p> Signup and view all the answers

    What is the relationship between the intensity of a sound and how loud it seems?

    <p>A sound that seems twice as loud is ten times more intense</p> Signup and view all the answers

    What is the faintest sound that can be heard?

    <p>Threshold of human hearing</p> Signup and view all the answers

    What is the relationship between a bel and a decibel?

    <p>A decibel is a tenth of a bel</p> Signup and view all the answers

    What happens when the source moves faster than the speed of sound?

    <p>A sonic boom is created</p> Signup and view all the answers

    What is the Doppler effect used for in medical diagnostics?

    <p>To evaluate blood velocity</p> Signup and view all the answers

    What is the frequency range of ultrasound waves?

    <p>Above 20 KHz</p> Signup and view all the answers

    What is the purpose of Doppler imaging?

    <p>To visualize velocities of moving tissues</p> Signup and view all the answers

    What is shown in a Doppler echocardiogram?

    <p>The direction of blood flow with different colors</p> Signup and view all the answers

    What is the Doppler effect used for in weather radar?

    <p>To track storm movement</p> Signup and view all the answers

    What determines the fundamental frequency of a string on a musical instrument?

    <p>The length and/or linear density of the string</p> Signup and view all the answers

    Why do guitar strings have different fundamental frequencies?

    <p>Because they have different densities</p> Signup and view all the answers

    What is varied in a piano to produce different frequencies?

    <p>The length and density of the strings</p> Signup and view all the answers

    How are individual strings tuned to exact frequencies?

    <p>By changing the tension of the string</p> Signup and view all the answers

    Why is it desirable to have small variations in tension between strings in a musical instrument?

    <p>To prevent warping and other damage</p> Signup and view all the answers

    What is the characteristic shape of a grand piano's sound box due to?

    <p>The variation in length and density of the strings</p> Signup and view all the answers

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