soundwaves_worksheet

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Northeastern University *

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PHYSICAL S

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Electrical Engineering

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Apr 3, 2024

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pdf

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Sound Waves Investigation Worksheet Name Part 1 Pre-lab Questions 1. For a wave, describe the relationship between frequency and wavelength. The shorter the wavelength, the stronger the frequency. The longer the wavelength, the weaker the frequency. 2. List the following mediums in order from fastest to slowest in terms of sound wave speed. Air (20°C), Water (20°C), Glass, Water (0°C), Seawater (20°C) Glass,Seawater (20°C),Water (20°C),Water (0°C) and Air (20°C) 3. Explain why the speed of sound is different in air compared to water. Water particles are more packed, so its harder to travel through. 4. Answer the following questions in terms of a wave’s frequency, wavelength, amplitude, and energy. a. Describe the characteristics of a high pitch wave. "high frequency, short wavelength." b. Describe the characteristics of a high-volume wave. 'a high amplitude and long wavelength.' Part 2 Doppler Effect Investigation 1. Generate your prediction and record your hypothesis: If the sound source is moving ____towards the observer_____________, then a stationary observer will hear ______a high_________ pitch. 2. Collected Data Data Table – Character 1, the observer Selected Pitch Pitch Observations – away from the observer Low note pitch became higher Medium note pitch became lower for a moment, then stayed the same High note as the train traveled, the high note began to sound like the medium note Data Table – Character 2, the sound source Selected Pitch Pitch Observations – away from the observer Low note stayed the same Medium note stayed the same High note stayed the same Part 3 Data Analysis and Conclusions 1. For the observer, what happened to the sound wave’s pitch as the sound source moved away from it? It decreased 2. For the person playing the violin (the sound source), what happened to the sound wave’s pitch as it moved away from the observer?nothing it stayed the same the whole way through. Unless Otherwise Noted All Content © 2022 Florida Virtual School. FlexPoint Education Cloud ™ is a trademark of Florida Virtual School.

3. Why did the observer (Character 1) hear a different sound than the violin player? Use your knowledge of sound waves and evidence from this investigation to support your response. Because the violin player was moving pass an observer on a train. 4. Describe two ways that your understanding of the Doppler effect could be applied to your everyday life. It could be used to determine how fast something is moving,also can be used to determine in what motion something is moving. Unless Otherwise Noted All Content © 2022 Florida Virtual School. FlexPoint Education Cloud ™ is a trademark of Florida Virtual School.

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