Understanding Waves and Signals
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Questions and Answers

What best describes the impact of a wave on a material?

  • It creates a permanent change in material structure.
  • It generates heat, causing thermal expansion.
  • It temporarily changes material by transferring energy. (correct)
  • It causes the material to become a different substance.

    • What fundamentally differentiates a sound wave with higher pitch from one with lower pitch?

  • Higher pitch results from lower amplitude.
  • Higher pitch results from higher frequency. (correct)
  • Higher pitch is determined by the wave's travel distance.
  • Higher pitch results from lower frequency.

    • Which of the following correctly defines an analog signal?

  • A signal made of distinct values that cannot vary.
  • A signal that uses only binary numbers.
  • A continuous signal representing a physical measurement. (correct)
  • A sporadic signal that changes erratically.

    • What is an advantage of digital signals compared to analog signals?

    <p>They convey information with less noise and distortion. (D)</p> Signup and view all the answers

    Which of the following is NOT an example of a digital signal?

    <p>Thermometer (C)</p> Signup and view all the answers

    What describes a mechanical wave?

    <p>Waves that transfer energy through vibrating molecules. (C)</p> Signup and view all the answers

    Which type of wave can travel through empty space?

    <p>Electromagnetic wave (D)</p> Signup and view all the answers

    How do transverse waves move energy?

    <p>At right angles to the direction of wave travel. (A)</p> Signup and view all the answers

    What does wavelength indicate about a wave?

    <p>The distance between two crests. (C)</p> Signup and view all the answers

    What does amplitude tell you about a wave?

    <p>The amount of energy it carries. (A)</p> Signup and view all the answers

    What happens during reflection of light?

    <p>Light bounces off an object. (B)</p> Signup and view all the answers

    What defines the action of transmitting light?

    <p>Light passes through the object. (D)</p> Signup and view all the answers

    Which of these is an example of a mechanical wave?

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

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