Of course you can use Google and Wikipedia to look up facts and formulas, but why take a chance it will be "Average Joe's" homework assignment or some unknown person editing Wikipedia who provides the information? Be safe - Get your engineering information straight from a professional engineer.
Click on the links below to find a list of resources for the following types of information:
Short description of a word, phrase or concept:
Engineering Dictionaries provide a one or two sentence definition of engineering terminology.
Encyclopedias provide several paragraphs about very common engineering concepts or topics.
More in-depth description (or basic introduction) of a concept or topic:
Engineering Encyclopedias usually provide more in-depth coverage of a concept or topic than general encyclopedias; could be several pages or more per article.
Books such as an introductory textbook for the specific area of engineering provide more descriptive info than a general encyclopedia or dictionary.
Handbooks and Manuals are usually one-volume works containing overviews of a specific area of engineering; very handy for getting a quick refresher to the basic knowledge of that specific area.
Formulas and Calculations:
Books such as an introcutory textbook for the specific area of engineering provide formulas in addition to descriptions and usually have exercises for applying those formulas.