Name: Sneezing Powder
SKU: 66968096
Price: 2194.00 ZAR
Availability: InStock
ISBN: 9786131069710

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Type

Physical Book

Publisher

Betascript Publishing

Language

English

Format

Paperback

ISBN13

9786131069710

Sneezing Powder

New Book Imported to South Africa

Delivery: 21 Oct - 29 Oct

R 2,194

R 2,194

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Synopsis "Sneezing Powder"

High Quality Content by WIKIPEDIA articles! Typically, a powder can be compacted or loosened into a vastly larger range of bulk densities than can a coarser granular material. When deposited by sprinkling, a powder may be very light and fluffy. When vibrated or compressed it may become very dense and even lose its ability to flow. The bulk density of coarse sand, on the other hand, does not vary over an appreciable range. The clumping behavior of a powder arises because of the molecular Van der Waals force that causes individual grains to cling to one another. Actually, this force is present not just in powders, but in sand and gravel, too. However, in such coarse granular materials the weight and the inertia of the individual grains are much larger than the very weak Van der Waals forces, and therefore the tiny clinging between grains does not have a dominant effect on the bulk behavior of the material.

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