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Tools and Basic Information for Design, Engineering and Construction of Technical Applications

Home page for water resources information from the US Geological Survey.

Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example ...

Middle School Chemistry provides free science activities, multimedia, and information about upcoming workshops offered by the American Chemical Society for middle school science teachers

Learn more about North Carolina State University, located in Raleigh, N.C., and consistently recognized as one of the nation’s top public universities.

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

Elmhurst College | Elmhurst, Illinois

YouTube is a place to discover, watch, upload and share videos.

Online weights and measures conversion. Online calculators for quick and easy metric conversion, conversion tables for both commonly used and very exotic units.

Free books to read and enjoy online. General interest hypertext-books and technical hyper-textbooks. Math, Physics, Cycling, Education, West Africa, and more.

wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual. Our multilingual how to manual has free step-by-step instructions on how to do all types of things.

Get Physics Help Online from our Expert Physics Tutors. Avail a Free Physics Tutoring Session and get Help with Physics Concepts from the Physics Problem Solver.