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Gr 10 Physical Sciences Ch 7: Compression and rarefaction
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Gr 10 Physical Sciences Ch 7: Compression and rarefaction

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Questions and Answers

What is the direction of particle displacement in a longitudinal wave?

  • Opposite to the direction of wave propagation
  • Parallel to the direction of wave propagation (correct)
  • At an angle to the direction of wave propagation
  • Perpendicular to the direction of wave propagation
  • What occurs during a compression in a longitudinal wave?

  • The density and pressure of the medium remain the same
  • The density and pressure of the medium become zero
  • The density and pressure of the medium increase (correct)
  • The density and pressure of the medium decrease
  • What is a rarefaction in a longitudinal wave?

  • A region where particles are at rest
  • A region where particles are closest together
  • A region where particles are furthest apart (correct)
  • A region where particles are moving in a circular motion
  • What is the relationship between compressions and rarefactions in a longitudinal wave?

    <p>They are alternating regions of high and low pressure</p> Signup and view all the answers

    What is an example of a longitudinal wave?

    <p>A slinky spring being pushed and pulled horizontally</p> Signup and view all the answers

    What is the characteristic of particle movement in a longitudinal wave?

    <p>Particles move back and forth</p> Signup and view all the answers

    What is the main difference between a compression and a rarefaction in a longitudinal wave?

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

    In a longitudinal wave, what happens to the pressure of the medium during a compression?

    <p>It increases above average</p> Signup and view all the answers

    What is the result of the particles moving closer together in a longitudinal wave?

    <p>An increase in the medium's pressure</p> Signup and view all the answers

    What is the characteristic of the medium's density during a rarefaction?

    <p>It is lower than average</p> Signup and view all the answers

    How do compressions and rarefactions move through the medium in a longitudinal wave?

    <p>As alternating regions of high and low pressure</p> Signup and view all the answers

    What is the visual representation of a longitudinal wave?

    <p>A slinky spring being pushed and pulled horizontally</p> Signup and view all the answers

    What is the effect of a compression on the density of the medium in a longitudinal wave?

    <p>The density of the medium increases</p> Signup and view all the answers

    In a longitudinal wave, what is the orientation of the particles' motion relative to the wave's propagation direction?

    <p>Parallel to the wave's propagation direction</p> Signup and view all the answers

    During a rarefaction, what happens to the pressure of the medium?

    <p>The pressure of the medium decreases</p> Signup and view all the answers

    What is the relationship between the density of the medium and its pressure during a compression?

    <p>The density increases, and the pressure increases</p> Signup and view all the answers

    In a longitudinal wave, what is the pattern of compressions and rarefactions?

    <p>Alternating regions of high and low pressure, and high and low density</p> Signup and view all the answers

    What is the characteristic of a longitudinal wave that distinguishes it from a transverse wave?

    <p>The particles of the medium move parallel to the wave's propagation direction</p> Signup and view all the answers

    What is the primary reason why the density of the medium is higher during a compression?

    <p>The particles are closest together, resulting in a higher density.</p> Signup and view all the answers

    Which of the following statements about compressions and rarefactions is true?

    <p>Compressions have a higher density and higher pressure, while rarefactions have a lower density and lower pressure.</p> Signup and view all the answers

    What is the result of the alternating regions of high and low pressure in a longitudinal wave?

    <p>The compressions and rarefactions travel through the medium.</p> Signup and view all the answers

    What is the relationship between the movement of the particles and the direction of the wave's propagation in a longitudinal wave?

    <p>The particles move parallel to the direction of the wave's propagation.</p> Signup and view all the answers

    What is the characteristic of a longitudinal wave that distinguishes it from other types of waves?

    <p>The particles move parallel to the direction of the wave's propagation.</p> Signup and view all the answers

    What is the visual representation of a longitudinal wave comparable to?

    <p>A slinky spring being pushed and pulled horizontally.</p> Signup and view all the answers

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