William Haynes's projects
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Numbas versions of problems from "Operating, Testing and Preventive Maintenance of Electrical Power Aparatus" by Charles I Hubert
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Engineering Statics Homework Problems. Problems have dynamic Geogebra diagrams and use the quantities extension.
Many are included in Engineering Statics: Open and Interactive, a free, online textbook.
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The Numbas Open Resource Library will be a collection of high-quality open-access questions and exams.
It is currently in the planning stages.