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Physics -- Pressure
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Image Gallery - Vortices
This image gallery contains images of fluid dynamics and vortices. The images are mostly pictures of vortices in the sky. Clicking on thumbnails provides access to higher resolution images.
The Baby's First Breath
This page of Hyperphysics, from Georgia State University, uses elasticity to explain why a baby needs help--like a smack on the bottom--to take its first breath and also why people with emphysema have so much difficulty...
This page from Hyperphysics illustrates the relationship between tension, pressure, and radius in a balloon. The same ideas are then applied to the walls of spherical and cylindrical containers. Several links provide...
This site from HyperPhysics provides a description of Pascal's Principle, which explains how pressure is transmitted in an enclosed fluid. Drawings and sample calculations are provided. Examples illustrating the...
Sizes of Organisms: The Surface Area: Volume Ratio
This website discusses the surface area to volume ratio and how it limits the size of organisms. The page shows how to calculate this ratio for cubes, and spheres and contains graphs that help clarify how the ratio...
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