mandy
10/10/2011 03:28:17 am

When you add books.The pressure will increase. The volume will decrease. Then when you take the books off the pressure will increase.

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Morgan Fast Wolf
10/10/2011 03:34:45 am

Everytime you add a single book, the volume decreases. Everytime you remove a book, the volume increases. The air is to compacted in where taking a book off will release more air which will then up the volume, kind of like breathing. Adding more books makes the air more compacted, so the volume decreases.

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shawn
10/10/2011 11:53:13 am

when you put more books on the handle, the pressure. and when you remove the books the pressure increases.

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