From time to time, a tutor might get asked questions about electric circuits.  In the context of tutoring or just for general interest, the maximum power transfer theorem  is nice. I last studied electronics about twelve years ago.  Ideas from …

Circuit analysis: The maximum power transfer theorem Read more »

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The tutor points out a habit some people don’t realize they have, yet it nickels and dimes them out of marks. It often comes up during tutoring….   Consider the following expression: Of course, we know this expression must equal …

Math: Calculator pitfalls with division Read more »

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Tutoring Biology 12, you cover this concept.  The tutor approaches it from a simple, practical point of view. You normally hear about monomers and polymers in organic chemistry.  Think of the name polyester:  it’s a polymer of esters.  The esters, …

Biology: monomers and polymers Read more »

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Tutoring high school chemistry, the mole is a central theme.  The tutor shows, explicitly, how to find the molar mass of a compound. Back on Sept 15 I opened the discussion about what a mole is. Whether or not students …

Chemistry: how to find the molar mass Read more »

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