Author Archives: e=mc2andallthat

About e=mc2andallthat

Gethyn Jones BSc, PGCE, MCCT is a physics teacher of over 29 years experience who still enjoys teaching (well, most of the time anyway). He lives in London with his lovely wife and two rescue cats. Please follow him on Twitter @emc2andallthat

From the Earth to the Sun in 270 BC

Originally posted on e=mc2andallthat:
The sun is only 32 miles across and not more than 3000 miles from the Earth. It stands to reason it must be so. God made the sun to light the earth, and therefore…

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From the Earth to the Moon in 270 BC

Originally posted on e=mc2andallthat:
The brain is wider than the sky, For, put them side by side, The one the other will include With ease, and you beside. Emily Dickinson How did human beings first work out the…

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Measuring the radius of the Earth in 240 BC

Originally posted on e=mc2andallthat:
The brain is wider than the sky, For, put them side by side, The one the other will include With ease, and you beside. Emily Dickinson, ‘The Brain’ Most science teachers find that ‘Space’…

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Binding energy: the pool table analogy

Originally posted on e=mc2andallthat:
Nuclear binding energy and binding energy per nucleon are difficult concepts for A-level physics students to grasp. I have found the ‘pool table analogy’ that follows helpful for students to wrap their heads around…

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Visualising How Transformers Work

Originally posted on e=mc2andallthat:
‘Transformers’ is one of the trickier topics to teach for GCSE Physics and GCSE Combined Science. I am not going to dive into the scientific principles underlying electromagnetic induction here (although you could read…

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A Gnome-inal Value for ‘g’

Originally posted on e=mc2andallthat:
The Gnome Experiment Kit from precision scale manufacturers Kern and Sohn. . . . setting storms and billows at defiance, and visiting the remotest parts of the terraqueous globe. Samuel Johnson, The Rambler, 17…

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Nature Abhors A Change In Flux

Originally posted on e=mc2andallthat:
Aristotle memorably said that Nature abhors a vacuum: in other words. he thought that a region of space entirely devoid of matter, including air, was logically impossible. Aristotle turned out to be wrong in…

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The Coulomb Train Model Revisited (Part 5)

Originally posted on e=mc2andallthat:
In this post, we are going to look at series circuits using the Coulomb Train Model. The Coulomb Train Model (CTM) is a helpful model for both explaining and predicting the behaviour of real…

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The Coulomb Train Model Revisited (Part 4)

Originally posted on e=mc2andallthat:
The Coulomb Train Model (CTM) is a helpful model for both explaining and predicting the behaviour of real electric circuits which I think is useful for KS3 and KS4 students. Without further ado, here…

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FIFA and Really Challenging GCSE Physics Calculations

Originally posted on e=mc2andallthat:
‘FIFA’ in this context has nothing to do with football; rather, it is a mnemonic that helps KS3 and KS4 students from across the attainment range engage productively with calculation questions. FIFA stands for:…

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