Measuring Sound Speed in Air
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Questions and Answers

What phenomenon allows sound to travel through air?

  • Electromagnetic waves
  • Light reflections
  • Vacuum of air
  • Vibrations of air particles (correct)
  • What is the primary flaw in the experimental method of measuring the speed of sound using a starting pistol?

  • The sound signal is too faint
  • Time is measured inaccurately due to human reaction time (correct)
  • Air pressure can affect the sound speed
  • The distance to the observer is too far
  • If an observer records a 1.2 s time difference when standing 400 m away, how can the speed of sound be calculated?

  • Using the formula $v = x \times t$
  • Using the formula $v = \frac{t}{x}$
  • Using the formula $v = \frac{x}{t}$ (correct)
  • Using the formula $v = x + t$
  • What is the accepted speed of sound in air?

    <p>330 m/s (D)</p> Signup and view all the answers

    Why does light reach the observer before sound when a starting pistol is fired?

    <p>Light travels faster than sound (D)</p> Signup and view all the answers

    What would likely affect the recorded speed of sound in an experiment?

    <p>Variability in human reaction times (A)</p> Signup and view all the answers

    What measurement is not directly related to calculating the speed of sound?

    <p>Weight of the sound source (A)</p> Signup and view all the answers

    What is a possible reason for the recorded value of 333 m/s being slightly above the accepted speed of sound?

    <p>Flaws in timing methods due to reaction time (C)</p> Signup and view all the answers

    When sound is produced, what is the first effect that occurs?

    <p>Particles in the air vibrate (D)</p> Signup and view all the answers

    Flashcards

    Sound Propagation

    The movement of vibrations through a medium, like air, caused by the collision of particles.

    Speed of Sound

    The distance a sound wave travels in a given amount of time.

    Meter (m)

    A unit of measurement for distance, often used in calculations involving sound.

    Second (s)

    A unit of measurement for time, often used in calculations involving sound.

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    Speed of Sound Formula

    A formula used to calculate the speed of sound by dividing the distance traveled by the time taken.

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    Time Difference

    The difference in time between seeing an event and hearing the sound of the event.

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    Reaction Time

    The ability of a person to react to a stimulus, such as a sound.

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    Speed of Light

    The time it takes for light to travel a certain distance, which is considered instantaneous for practical purposes.

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    Standard Speed of Sound in Air

    The accepted value for the speed of sound in air, under normal conditions.

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    Study Notes

    Measuring Sound Speed in Air

    • Sound travels through air by vibrating air particles, transferring the vibrations to the ear drum.
    • Light travels much faster than sound.
    • Sound speed is calculated by dividing the distance sound travels by the time it takes to travel that distance.
    • The formula for calculating sound speed is: speed = distance / time.
    • Units:
      • Speed (v): meters per second (m/s)
      • Distance (x): meters (m)
      • Time (t): seconds (s)
    • Example Calculation:
      • Distance (x): 400 meters
      • Time difference (t): 1.2 seconds
      • Speed (v): 400 m / 1.2 s = 333.3 m/s.
    • Accepted speed of sound in air: 330 m/s
    • Limitations of the method:
      • Observer reaction time variation can lead to inaccurate results.
      • Differences in how observers use stopwatches can affect precision.

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    Description

    Explore the principles of sound speed measurement in air. This quiz covers the calculation formula, the speed of sound, and factors affecting accuracy. Test your understanding with practical examples and limitations.

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