A well planned site with lots of informations in Physics!

Vinita Sharat, The Shri Ram School, India

I was new to teaching IB and moved to a brand new school with no other Physics teacher and no resources at all... With the huge help from the InThinking Physics site I was able to put in place a course with no problems at all. It has been like having...

Graeme Keer-Keer, Alcanta International School, China

InThinking site for IB physics is a wonderful resource to learn and teach IB physics effectively. I have been trained mostly through Chris Hampers' ideas and innovations on this site. I couldn't have made it without this resource. Thank you for making...

Sarika Dudeja, The Heritage School, India

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The big bang

10 September 2019

The PhET simulation is great but you can't beat real balloons for introducing electric fields. This year I bought extra big ones, not so good... more

Going to extremes

10 September 2019

Doing measurement of g by dropping a ball using the Pasco kit. Thought it might be an idea to try with the longest drop possible... more

Subscriber comments

  • 15 Sep Amtul Qayyum
    Paper 2
    Chris, thanks! This section is a great help.
  • 12 Sep Frank Ansari
    Paper 2
    This section is especially useful. When I was teaching GCSE, the syllabus booklet included 'verbs' and the expectation that went with each. IB however, does not publish such a list. I try to emphasize this aspect but my list is quite brief....
  • 11 Sep Chris Hamper
    Test: Electrical power (2)
    Oops, it looks like I have written the answers to b and c the wrong way round. I'll correct it in a minute.
  • 10 Sep Fergus Gray
    Test: Electrical power (2)
    Hi Chris. Just checking the answer to 1(b). I thought the power dissipated inside a battery was due to the current flowing through its internal resistance. P=I^2r=(0.086)^2*(5)=0.037W. Is this wrong?
  • Makes sense with a lot of data. OK I'll change the answer.
  • The even/odd rounding rule comes from statistical analysis. I was also confused when I first heard of it from a student. When analyzing large data sets, trends tend to err upward when always rounding 5 up to the next digit. If you alternate...
  • 6 Sep Chris Hamper
    Ideas for investigations
    Yes although any thermometer is probably ok.
  • 5 Sep Amtul Qayyum
    Ideas for investigations
    Thanks Chris. Should he use a thermo-couple to measure the temperature?
  • Well you learn something everyday. Never heard of this even number rule before, interesting.
  • Continuing my above comment, I would add that when I performed the calculation, calculator display answer came as 0.024975025. Here the 2nd sig.fig is 4 not 5. So, the correct answer should be 0.02, even by applying simple rule (without realizing...
  • Hi Chris, I would agree with eric. Because if there are no figures after the 5, then the last figure kept should be unchanged if that last figure is even. Check following references: Well, I agree that this distinction of consideration between...
  • 3 Sep Chris Hamper
    Ideas for investigations
    Type of paint is difficult to quantify, area painted white might be better. Could make a model with a black ball in front of a lamp and see how the equilibrium temp depends on area painted whit. Streets in LA is nice context.


Higher Level Physics

Higher Level Physics by Chris Hamper. Comprehensive coverage of the entire HL course.

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