Difference between revisions of "Talk:843: Misconceptions"
| Line 4: | Line 4: | ||
<br/>[[User:Smperron|Smperron]] ([[User talk:Smperron|talk]]) | <br/>[[User:Smperron|Smperron]] ([[User talk:Smperron|talk]]) | ||
Your professor was simply incorrect. Glass never was, and has never been, an "extremely viscous fluid". Molten glass is a "molecular liquid" where the viscosity depends on temperature. [[Special:Contributions/75.103.23.206|75.103.23.206]] 22:14, 13 December 2012 (UTC) | Your professor was simply incorrect. Glass never was, and has never been, an "extremely viscous fluid". Molten glass is a "molecular liquid" where the viscosity depends on temperature. [[Special:Contributions/75.103.23.206|75.103.23.206]] 22:14, 13 December 2012 (UTC) | ||
| + | <br>"Extremely viscous fluid" is just another way to describe an amorphous solid (as opposed to the crystallic solid). There is no sharp cut-off between these states. Just at some point it starts feeling solid enough, so it gets called a solid. See the Pitch Drop Experiment [http://en.wikipedia.org/wiki/Pitch_drop_experiment] for an example (though glass is obviously harder than pitch). [[Special:Contributions/108.162.246.11|108.162.246.11]] 19:21, 16 January 2014 (UTC) | ||
Revision as of 19:21, 16 January 2014
- Note: The xkcd forums contain a great discussion of this comic.
When I took Calculus-based Physics in college (2003), my professor taught us that glass was an "extremely viscous fluid." When was glass reclassified as an amorphous solid?
Smperron (talk)
Your professor was simply incorrect. Glass never was, and has never been, an "extremely viscous fluid". Molten glass is a "molecular liquid" where the viscosity depends on temperature. 75.103.23.206 22:14, 13 December 2012 (UTC)
"Extremely viscous fluid" is just another way to describe an amorphous solid (as opposed to the crystallic solid). There is no sharp cut-off between these states. Just at some point it starts feeling solid enough, so it gets called a solid. See the Pitch Drop Experiment [1] for an example (though glass is obviously harder than pitch). 108.162.246.11 19:21, 16 January 2014 (UTC)
