Why does a piece of glass stick to another piece of glass?

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Homework Help Overview

The discussion revolves around the phenomenon of two pieces of glass sticking together, particularly in the context of a school demonstration involving "Over Polished" substances. Participants are exploring the underlying reasons for this adhesion.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are questioning the role of air pressure in the adhesion of the glass pieces, with some expressing uncertainty about the concepts discussed in the lecture. There are attempts to connect the phenomenon to friction and atmospheric forces.

Discussion Status

The discussion is ongoing, with various interpretations being explored regarding the factors contributing to the adhesion. Some participants are seeking clarification on the role of air pressure and the forces at play, while others are attempting to relate the situation to broader concepts in physics.

Contextual Notes

There is mention of a lab demo that was observed rather than actively participated in, which may contribute to the uncertainty in understanding the concepts involved. Participants are reflecting on the information presented during the lecture and the implications of "Over Polished" surfaces.

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Homework Statement


What does a piece of glass stick to another piece of glass? We conducted a demo in school where we stuck to pieces of identical see-through glass on top of each other and they stuck together for a second or two.


Homework Equations


None whatsoever other than it was about "Over Polished" Substances


The Attempt at a Solution


It sticks due to their friction
 
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Air pressure would have nothing to do with it?
 
^ I'm sorry... Its just that its been two weeks since that lecture and he told us just to watch it... It was a lab demo of Over Polished substances...
 
Sorry to ask but is it air pressure?
 
Why does a sucker-tipped arrow stick to a target?
 
Draw a free-body diagram and indicate where atmospheric pressure exerts forces. How much "atmosphere" exists between two pieces of identical highly-polished pieces of glass?
 

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