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Reference
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5 sites in Reference
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Online resource providing engineering, science, math, physics and chemistry formulae for reference.
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Descriptions, equations, calculators, conversions and material data for engineering, mathematics, physics and chemistry.
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Contains astronomical/space constants and equations.
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Provides a full-text search across the gray literature of multiple government agencies within a science portal of technical reports.
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Offers homework help, math tricks, science news, periodic table, and a discussion forum.
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