## Physics: dilution of gravity

Tutoring physics, gravity is perennial. The tutor explains the dilution of gravity that occurs on a slope. Everyone knows that a ball rolls more slowly down a slope than if it falls straight down. The gentler the slope, the more slowly …

## Circuit analysis: The maximum power transfer theorem

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 …

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## Chemistry: how to find the empirical formula

Tutoring high school chemistry, you’re asked this every year.  The tutor shows a simple example of how to find the empirical formula. Back on September 12, I wrote a post on percent composition. Finding the empirical formula can be the …

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## English: absolve of, or absolve from?

Tutoring English, especially business or essay writing, you might be asked about the right preposition to use.  The tutor shares a gem he found in an old textbook. The phrases “absolved of guilt” or “absolved of any wrongdoing”, though I’m …

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## Math: Calculator pitfalls with division

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 …

## Biology: monomers and polymers

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, …

Tutoring high school English, you focus on essay writing.  The tutor discusses an issue he remembers from long ago…. One time when I was in grade two (yes, that long ago), we were writing stories for creative writing.  Our desks …

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## Algebra: equations with x on both sides

Tutoring high school math, you might help students whose equation solving skills are rusty.  The tutor shows a technique students must know….   Equation solving can be like fitness. A student can be good at it, but then get out …

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## Chemistry: how to find the molar mass

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: solubility product

Tutoring chemistry, you’re likely asked about this every year.  The tutor shows an example. Solubility, in chemistry, is the ability of a solute (the chemical being dissolved) to achieve dissolution in a solvent (the liquid that the solute dissolves into, …

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