The Permaculture Research Institute (PRI) describes permaculture as "the harmonious integration of landscape and people providing their food, energy, shelter,...
The Permaculture.net website offers several services to those interested in learning more about permaculture including a Courses & Internships Database, a...
This website from Permaculture Magazine offers a selection of gratis online articles. According to the site, this section "has sample articles from previous...
Tim Winton of Permaculture International Limited (PRI) provides information about permaculture-practicing farms and other organizations that offer a variety of...
AMSER is a portal of educational resources and services built specifically for use by those in Community and Technical Colleges but free for anyone to use.
AMSER is funded by the National Science Foundation as part of the National Science Digital Library, and is being created by a team of project partners led by Internet Scout.
As a moving ball shoves air aside, it transfers kinetic energy to the air. Since acceleration = force/mass, the ball must decelerate. That means the ball can't travel as far in the limited time available before gravity pulls it back to Earth.
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