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I need to know how a vacuum works anyone?
A vacuum is an area with absolutely nothing in it, not even air. We watched a video in science once and what happens is you use a pump that somehow displaces the air out through a pipe, out of the vacuum.
go to this link I used to work for a vacuum shop and this one is pretty good at describing it
http://shopping-fun.top54u.com/post/How-does-a-vacuum-cleaner-work.aspx
if you don't know then look it up in your book
what is it
what is it
