Hi Tim, HL Paper 1, question 1 - shouldn't the answer be 0.9cm +- 11%? You subtract the two diameters, and halve it for the "thickness" of the wall. You therefore add the two abs. uncertainties, and halve it to keep in proportion. This...
Mock Examinations (2025-26)Yes. This one worked. Thanks
Christmas crosswordHmm, it's working for me. Is this any good? xmas2020clues(2).pdf
Christmas crosswordCan't download the pdf. Its getting downloaded as a small lo res png file
Christmas crosswordHi Katherine, Thanks for letting us know. I think I can see what the problem might be and I'll try and fix it asap. Tim
Teach: Gravitation and orbitsPBL Orbits link is not working anymore?
Teach: Gravitation and orbitsHi Fethiye, thanks for writing! Tim has already provided a response relating to IA collaboration, which we have some guidance on here: https://thinkib.net/physics/page/51211/originality-collaboration-and-ai If...
Exemplar marking commentsHi Fethiye. Tim here picking up your question. Can I first double check that your two students' experiments are for the Internal Assessment aspect of the course rather than them being Physics Extended Essays? If they are proposing these...
Exemplar marking commentsHi Emma i have two ee students ,First one's research question is :How does the time taken to reach terminal velocity of analuminium sphere depend upon the viscosity of the fluid it is falling through? and second one has To what extent does...
Exemplar marking comments
Tim
Site authorHi Ralph, You are absolutely correct - apologies for the typo and well done for being the first to spot it! Tim
Mock Examinations (2025-26)