Choose the correct snapshot graph longitudinal waves

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Homework Help Overview

The discussion revolves around interpreting a figure and graphs related to longitudinal waves, specifically focusing on displacement from equilibrium and the spatial arrangement of "atoms" in the context of wave behavior.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • Participants express uncertainty about reading the figure and graphs. One participant attempts to clarify the meaning of displacement (D) and its relation to equilibrium spacing, while others share their interpretations of specific points on the graph.

Discussion Status

Some participants have provided interpretations of the graphs, suggesting that option "a" is correct based on their analysis of displacement values. However, there remains a lack of consensus, as some participants express confusion about the calculations and the overall setup.

Contextual Notes

There is mention of needing clarification on how displacement (D) is calculated, indicating potential gaps in information that may affect the discussion.

firezap
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Homework Statement


http://i.imgur.com/4dL6TQY.jpg

I don't know how to read the figure or the graphs. O_O
 
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firezap said:

Homework Statement


http://i.imgur.com/4dL6TQY.jpg

I don't know how to read the figure or the graphs. O_O

I think that D is the displacement from equilibrium. Negative D ==> closer than equilibrium, Positive D ==> greater than equilibrium spacing. D = 0 ==> equilibrium spacing
The first two "atoms" are spaced 1 cm apart, which is equal to the equilibrium spacing. From these clues, it looks like "a" to me, but things look screwy to me after the first four cm... It would help to know how D is being calculated...
 
It's a. I look at the graph at x = 3cm and displacement = -1cm. The dot would move left 1cm, so the dot is at 2.
 
firezap said:
It's a. I look at the graph at x = 3cm and displacement = -1cm. The dot would move left 1cm, so the dot is at 2.
Yes, it's a.
 

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