Christmas tree lights puzzle
I have just been taking down the lights from our Christmas tree and noticed something interesting. One set had a transformer the other didn't. The one that didn't had 70 LEDs arranged in series. The pd...
Circuits without fields
I have been looking at the new subject guide and there are some interesting changes. The biggee is no options however most of special relativity, thermodynamics, resonance and rotational mechanics plus...
Holiday Event: invitation
Chris and Emma invite you to join us for an end-of-term holiday celebration. We'll talk physics, teaching and all things IB. Drop in for an hour or just 15 minutes, prepare to have your camera and microphone...
Christmas crossword 2021
Not all the words are physics related but most are. This is a cryptic crossword, the clues are not direct, here is some information as to how they work: PDF version Solution...
Cross-curricular linking
This is Hector, he was one of my students, he is now one of MIT's students. More about him later. Last weekend I was at a climbing competition with another student Filip. Whenever I met one of my friends...
Swimming pool investigations
There is a swimming pool next to my school, I thought it might be fun to think up some investigations that could be carried out there, here's a quick list: That'll do for now....
Have we been lying?
In his recent video about the transmission of electrical energy Derek Muller accuses physics teachers of lying to their students. One of my students saw this video before me and asked me the question....
Talking head
Parkinson's is a progressive illness and as it progresses typing is becoming more and more difficult, that's why I am producing videos rather than text based resources. Luckily there are already plenty...
Our new car
I've been talking about buying an electric car for years and now we have. It's a VW id3. 75% of new cars in Norway are electric and there are many reasons why. The only problem is the lithium battery....
Conceptual physics
On Tuesday we had an in service training day on conceptual learning, it turned out to be quite an eye opener. There is a classic physics textbook called Conceptual physics by Paul Hewitt. I have always...