Northern lights
There was a pretty good diaplay of the northern lights last friday as shown in this photo by our principal. I thought I would make a video explaining the phenomenum to students who don't take physics....
Physics teacher memes
There must be a lot more possibilities along these lines....
Pool ball analysis
One of my students is doing his IA on the relationship between the perpendicular distance between the direction of a pool ball and the centre of a ball that it hits and the angle between the original...
Cohere - rant
It was just a passing thought but it turned into a big discussion on Facebook. We all know that two lamps won't interfere with each other, the reason is that they are not coherent. Each lamp is made of...
Newton's pigs
One of my student's sent me a question about the classic pig in an elevator problem. "Hi Chris, how can it be that the normal force is calculated these two different ways when the elevator is accelerating...
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Explanations: Reflections
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Spin demo
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Explanations
Today I asked my class, of which Adriana from Romania was a member, to explain why the temperature of an insulated cylinder of gas will increase when the volume is reduced. The rather fragmented explanations...
Student access a different approach
Last year we wrote the study guide which is basically an online textbook with hundreds of animations. Since then I have been making it even more interactive by adding hundreds of multiple choice questions...
A river runs through it
It was a white Christmas but a wet new year so the stream that runs under our house is in full flow. I posted this photo on facebook and within seconds one of my former students, Erik Torstensson, commented...