Editing 843: Misconceptions

Jump to: navigation, search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision Your text
Line 21: Line 21:
 
:''That {{w|glass}}, while seeming solid, is actually an extremely viscous liquid and will flow over time, as is seen on older buildings where the window panes are thicker at the bottom.''  
 
:''That {{w|glass}}, while seeming solid, is actually an extremely viscous liquid and will flow over time, as is seen on older buildings where the window panes are thicker at the bottom.''  
 
This myth likely arises from the fact that glass is an {{w|amorphous solid}} without a well-defined freezing point. In fact, glass becomes effectively solid once it cools down to around 1400 degrees centrigrade. At room temperature, it cannot flow at perceptible rates over human timescales. Old window panes had variable thickness due to the manufacturing process, and the thick end was generally (though not always) placed at the bottom for stability.
 
This myth likely arises from the fact that glass is an {{w|amorphous solid}} without a well-defined freezing point. In fact, glass becomes effectively solid once it cools down to around 1400 degrees centrigrade. At room temperature, it cannot flow at perceptible rates over human timescales. Old window panes had variable thickness due to the manufacturing process, and the thick end was generally (though not always) placed at the bottom for stability.
 +
 +
It seems that Miss Lenhart has corrected her course from [[803: Airfoil]], where she taught another common misconception.
  
 
==Transcript==
 
==Transcript==

Please note that all contributions to explain xkcd may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see explain xkcd:Copyrights for details). Do not submit copyrighted work without permission!

To protect the wiki against automated edit spam, we kindly ask you to solve the following CAPTCHA:

Cancel | Editing help (opens in new window)