Translations

Code	Language		Translator	Run

Credits

Fu-Kwun Hwang; Loo Kang Wee

https://iwant2study.org/moodle402/mod/laejss/view.php?id=48 Data Analytics version

 

Briefing Document: SLS Wave in 1D of Particles and Springs Simulation

This briefing document summarizes the key information regarding the "SLS Wave in 1D of Particles and Springs JavaScript Simulation Applet HTML5" resource, drawing from the provided excerpts.

1. Main Theme:

The primary theme of this resource is the illustration and investigation of longitudinal waves using a particle-spring model. The simulation allows users to visualize how a disturbance propagates through a medium as a wave. Furthermore, it aims to demonstrate the relationship between the properties of the medium (specifically the "stiffness" of the springs representing inter-particle forces) and the speed of the wave.

2. Most Important Ideas and Facts:

• Simulation Description: The simulation depicts a "row of particles that are connected by springs." When one end particle is displaced, this "disturbance travels to the other end as a longitudinal wave."
• Longitudinal Waves: The simulation is specifically designed to illustrate this type of wave, where the particle displacement is parallel to the direction of wave propagation.
• Variable Investigation: Spring Stiffness: The key variable that users can manipulate is the "stiffness" of the springs connecting the particles.
• Definition of Stiffness: A "stiffer" or less elastic spring exerts a "greater force" on connected particles for the same displacement. Conversely, a less stiff or more elastic spring exerts a "smaller force."
• Investigating Wave Speed: A central purpose of the simulation is to "investigate how varying the stiffness of the springs affects how fast the longitudinal wave travels."
• Modeling Inter-particle Forces: The springs in the simulation serve as a model for the forces of attraction between particles in a medium.
• "The particles in the simulation interact through the springs, which exert forces on the particles; similarly, forces of attraction exist between particles in matter."
• "The springs in the simulation model the attraction between particles in matter – the stiffer the springs, the stronger the forces of attraction between particles."
• Relating to States of Matter and Sound Speed: The simulation can be used to model how the strength of inter-particle forces affects the speed of sound.
• Stronger forces of attraction (stiffer springs) are analogous to the solid state, while weaker forces (less stiff springs) are analogous to the gaseous state.
• The resource states that it can "also model how the forces of attraction between particles in a medium affects the speed of sound in the medium."
• Open Educational Resource: The resource is identified as part of "Open Educational Resources / Open Source Physics @ Singapore," indicating its intention for educational use and potential for adaptation.
• Credits and Authorship: The simulation is credited to Fu-Kwun Hwang and Loo Kang Wee. The adapted version is also attributed to them with a copyright year of 2022.
• Technical Details: The simulation is a "JavaScript Simulation Applet HTML5," indicating its web-based nature and use of these technologies. It was "Compiled with EJS 6.1 BETA (201115)."
• Adaptation: The 1D simulation is explicitly stated as being "adapted from 'Wave in 2D of Particles and Springs' by Fu-Kwun Hwang, Loo Kang WEE [CC-BY-NC-SA 4.0] via Open Source Physics." This highlights its lineage and the open license under which the original work was shared.
• Embeddable: The resource provides an iframe code snippet to "Embed this model in a webpage," suggesting its usability within other online learning environments.
• Licensing: The content is licensed under the "Creative Commons Attribution-Share Alike 4.0 Singapore License," promoting sharing and adaptation with proper attribution. Commercial use of the underlying "EasyJavaScriptSimulations Library" requires a separate license.

3. Potential Investigations and Inferences:

The resource explicitly suggests the following potential investigations and inferences:

• "The simulation can be used to investigate how varying the stiffness of the springs affects how fast the longitudinal wave travels."
• It can "also model how the forces of attraction between particles in a medium affects the speed of sound in the medium."

4. Connections to Other Resources:

The page includes a lengthy list of "Other Resources," many of which are also JavaScript/HTML5 simulation applets covering a wide range of physics, mathematics, chemistry, and even language learning topics. This suggests a broader ecosystem of interactive educational tools developed and shared by this group.

5. Target Audience:

Based on the description and the context of "Open Educational Resources / Open Source Physics," the target audience is likely educators and students in physics or related science disciplines who are learning about wave phenomena, particularly longitudinal waves and the factors influencing their speed. The mention of modeling sound speed suggests relevance to acoustics as well.

Description

This simulation can be used to illustrate longitudinal waves, and investigate how the speed of a wave is affected when certain conditions are changed. It can also be used to model how the forces of attraction between particles in a medium affects the speed of sound in the medium.

What does the simulation show?

The simulation consists of a row of particles that are connected by springs. When a particle at one end is displaced (by pulling it to the left or right), the disturbance travels to the other end as a longitudinal wave.

What is the variable we are investigating?

In this simulation, we can vary the “stiffness” of the springs. When a spring is “stiffer” or less elastic, a greater force is exerted on the particles connected by the spring. Conversely, a less “stiff” or more elastic spring exerts a smaller force on the particles for the same displacement.

Possible investigations and inferences

The simulation can be used to investigate how varying the stiffness of the springs affects how fast the longitudinal wave travels. It can also model how the forces of attraction between particles in a medium affects the speed of sound in the medium.

The particles in the simulation interact through the springs, which exert forces on the particles; similarly, forces of attraction exist between particles in matter. In the solid state, forces of attraction between particles are strong. In the gaseous state, forces of attraction between particles are weak. The springs in the simulation model the attraction between particles in matter – the stiffer the springs, the stronger the forces of attraction between particles.

 Version:

1. https://weelookang.blogspot.com/2020/04/how-to-edit-ejss-from-wave-in-2d-of.html
2. https://weelookang.blogspot.com/2018/09/wave-in-2d-of-particles-and-springs.html 

Other Resources

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Frequently Asked Questions: 1D Wave Simulation of Particles and Springs

1. What does this simulation demonstrate?

This simulation visually demonstrates the propagation of a longitudinal wave through a one-dimensional medium. The medium is modeled as a series of particles connected by springs. When one end particle is displaced, this disturbance travels along the row of particles as a wave, where the particles oscillate parallel to the direction of wave propagation.

2. What type of wave is modeled in this simulation?

The simulation specifically models a longitudinal wave. In a longitudinal wave, the displacement of the particles in the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave. This is contrasted with transverse waves, where particle displacement is perpendicular to the direction of wave propagation.

3. What key variable can be adjusted in this simulation?

The primary adjustable variable in this simulation is the stiffness of the springs connecting the particles. This allows users to explore how the elastic properties of the medium affect wave behavior.

4. How does the stiffness of the springs affect the forces between particles?

The stiffness of the springs directly relates to the force exerted between connected particles for a given displacement. Stiffer springs (less elastic) exert a greater restoring force on the particles when stretched or compressed. Conversely, less stiff springs (more elastic) exert a smaller restoring force for the same displacement.

5. What aspect of wave behavior can be investigated by changing the spring stiffness?

By varying the stiffness of the springs, users can investigate how this property of the medium affects the speed at which the longitudinal wave travels through the particle-spring system.

6. How does the particle-spring model relate to real-world phenomena?

The simulation uses springs to model the forces of attraction that exist between particles in real matter. In solids, these attractive forces are strong, analogous to stiff springs. In gases, these forces are weak, analogous to less stiff springs. Therefore, the simulation can be used to understand how the strength of inter-particle forces in different states of matter influences the speed of sound (a longitudinal wave) within those media.

7. Who created this simulation?

This simulation is adapted from the "Wave in 2D of Particles and Springs" by Fu-Kwun Hwang and Loo Kang Wee, who are also credited for this 1D version.

8. Under what license is this simulation released?

The "Wave in 1D of Particles and Springs" simulation, adapted from the 2D version, is released under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license. The original 2D simulation also carries this license

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