Latest updates

  • 17 November 2022

    School lever Free

    With a long enough lever you can lift anything. Here I am trying to move millstone from the river by  my house. I have moved it 2m in 2 days means it will be in out garden some time next year. The mechanical advantage is about 20 since the...

  • 17 November 2022

    IA 2022 Free

    Actually the title should be 2023 since that is when this lot will do their exam, however I always get the IA done early so my first year students have just handed in their 1st draft. I have given feedback and they have 1 week to finish it...

  • 17 November 2022

    Best fit curves in GeoGebra Free

    Some of my students and I are having difficulty plotting curves in Loggerpro. There seems to be some bugs. Curve plotting is necessary in the IA when an equation can not be linearised, however it is important that the curve plotted is based...

  • 17 November 2022

    Daily IA Free

    I really like this one. I common with most excellent investigation it's a simple idea but it turns out complex. On the face of it it's a too simple. What is the relationship between the resistance and length of a conductor. But this conductor...

  • 17 November 2022

    Daily IA Free

    This is Aaro, he is from Finland so is naturally going to do his IA in the sauna, plotting isotherms for air at different temperatures. I'm not quite sure about the actual research question but something to do with gas at least.

  • 17 November 2022

    Daily IA Free

    Clara is researching the amplitude of waves on a ripple tank. Actually she started measuring waves in the Fjord located (about 50 meters from my lab) but found it too impressice.The ripple tank is more calm but it's difficult to take measurements....

  • 17 November 2022

    Daily IA Free

    Adrianna is doing her investigation on a hot air balloon made from bin liners. The research question is "what is the relationship between the uward force eperienced by a hot air balloon and its temperature". It is quite difficult to Measure...

  • 17 November 2022

    Daily IA Free

    This is Dharsh, he is doing his IA on the hump-back bridge measuring the velocity at which a ball takes flight when rolling over a circular bridges of different radii. To be able to determine lift off he split the plastic pipe allowing the...

  • 17 November 2022

    Jet on jets Free

    This is Jet Gunning. Guess what she is doing her individual investigation on.

  • 17 November 2022

    Daily IA Free

    My 1st year students are doing their individual investigations at the moment so I thought I would share one each day. This is Ben, he is blowing down a tube attached to a pressure sensor. There is a little hole in the side of the tube letting...

  • 17 November 2022

    10 IA ideas with toilet paper Free

    Can I really think of 10 ideas based on a roll of toilet paper? probably not but I'll have a go. 1. Snatching a piece Have you ever noticed how, by pulling fast, you can snatch off a piece from a full roll but not an empty one? It's all to do...

  • 17 November 2022

    Physics meme 2 Free

    Maybe the department store didn't help you to understand circuits?

  • 17 November 2022

    Pool ball analysis Free

    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 direction and the direction of the ball...

  • 17 November 2022

    Why two lamps don't interfere Free

    Why don't two lamps  interfere with each other? The reason is that they are not coherent. Each lamp is made of a large number of atomic wave sources that have random phase, the wavefront produced from each lamp changes with time so any interference...

  • 17 November 2022

    Newton´s pigs Free

    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 downwards and upwards?" v

  • 17 November 2022

    Explanations Free

    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 led me to spend some time talking...

  • 17 November 2022

    A river runs through it Free

    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 about installing turbine. So I thought...

  • 17 November 2022

    Christmas tree lights puzzle Free

    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 across each was only 220/70 which is about...

  • 17 November 2022

    Swimming pool investigations Free

    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.

  • 17 November 2022

    Is your teacher lying about electricity? Free

    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. I got the answer right :-) However I'm...