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What is the side of a book called?
It is called the spine>
In geometry is a partially opened newspaper a plane?
It is the intersection of two planes at the spine of the paper -- two flat regions represented by the two pages of the newspaper. Each is a separate plane, and they cannot be coplanar since there is an angle between them. If you lay the paper out flat, they become a single plane.
Kyphosis?
Exaggerated thoracic curve giving a "humpback" appearance.
What are mesh office chairs and are they good?
Mesh back chairs have become extremely popular in recent years. The mesh back is available on all types of chairs – visitor, meeting, task, executive, and drafting chairs. Not only do they look good, but modern technology has made them reliably constructed, and these are also very supportive for the chair user. The mesh material allows air to flow through the back of the chair often keeping the chair and user cooler throughout the day, particularly when the chair is being used for long periods of time. It helps maintain the natural spine posture while giving adequate support to lower and upper back muscles. Their ergonomic design and light-weight structure keep you comfortable all day long. With an upholstered seat, mesh chairs offer contoured support for excellent back support.
