Smooth Surface that Stick
Why do very smooth sufaces stick together? such as
mechinist gage blocks that are rung together.
When most molecules come close together, they tend to cling to each other.
In most cases, there is not enough attraction to cause te surfaces to stick.
When very smooth surfaces that match each other's shape come together, many
molecules of one surface are very close to many molecules of the other
surface. Many small attractions result. All these small molecular
attractions result in a fairly strong total effect.
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Update: June 2012