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Resonance is demonstrated using a guitar. The 6th (E) string is played and gradually shortened by holding it down at successive frets. When held at the 5th fret it causes a paper rider on the 5th string (A) to vibrate and fall off. That's because the shortened 6th string has a frequency of 110 Hz which matches the natural frequency of the 5th string (A = 110 Hz). This is a good demonstration of...

Student experiments involving Faraday’s law of induction are rarely done because it’s hard to get sufficient and reliable data. In this video I demonstrate five great pracs that could be ideal for your keener students in Year 12 physics. There are five pracs in this video: 1. Falling magnet and a digital storage oscilloscope (DSO) (starts 0:0) 2. Pendulum magnet and a digital storage oscillosco...

This is a presentation made to physics teachers as part of a professional development session at the University of Queensland and at Griffith University in November 2023. It details some of the ways students lose marks on the external exam in physics run by the Queensland Curriculum and Assessment Authority (QCAA). But more importantly, it gives students and teachers some ideas for preventing t...

This is first part of a presentation I made for chemistry teachers' PD at the University of Queensland and Griffith University (Australia). I titled it "Two great acid-base equilibrium pracs for senior chemistry" and this first part describes a heat of neutralisation titration prac that works really well for student experiments. Part two is about the conductivity of a weak acid (acetic acid) as...

This is second part of a presentation I made for chemistry teachers' PD at the University of Queensland and Griffith University (Australia). I titled it "Two great acid-base equilibrium pracs for senior chemistry" and this second part describes a prac about the conductivity of a weak acid (acetic acid) as a function of initial concentration. It works really well for student experiments. The fir...

Dr Richard Walding presents a lecture on "Graphing - worked examples" for his Year 11 Physics class at Moreton Bay College, Brisbane, Australia. This lecture covers material from his "New Century Physics for Queensland" Unit 1 & 2 textbook, Section 10.5B pages 280-281. Published by Oxford University Press. I made these videos as a resource for my remote schooling during the April/May 2020 Covid...

Dr Richard Walding presents a lecture on "Graphing - uniform acceleration" for his Year 11 Physics class at Moreton Bay College, Brisbane. This lecture covers material from his "New Century Physics for Queensland" Unit 1 & 2 textbook, Section 10.5 pages 284-285. Published by Oxford University Press.

Dr Richard Walding presents a lecture on "Graphs of linear motion - constant speed" for his Year 11 Physics class at Moreton Bay College, Brisbane. This lecture covers material from his "New Century Physics for Queensland" Unit 1 & 2 textbook, Section 10.4 pages 284 - 288. Published by Oxford University Press.

Dr Richard Walding presents a lecture on "Speed and velocity" for his Year 11 Physics class at Moreton Bay College, Brisbane. This lecture covers material from his "New Century Physics for Queensland" Unit 1 & 2 textbook, Section 10.3 pages 282-283. Published by Oxford University Press.

Dr Richard Walding presents a lecture on "Distance & displacement" for his Year 11 Physics class at Moreton Bay College, Brisbane. This lecture covers material from his "New Century Physics for Queensland" Unit 1 & 2 textbook, Section 10.2 pages 278-281. Published by Oxford University Press.

Dr Richard Walding presents a lecture on "TVectors and scalars" for his Year 11 Physics class at Moreton Bay College, Brisbane. This lecture covers material from his "New Century Physics for Queensland" Unit 1&2 textbook, Section 10.1 page 274. Published by Oxford University Press, 2019.

Dr Richard Walding presents a lecture on "Length contraction" for his Year 12 Physics class at Moreton Bay College, Brisbane. This lecture covers material from his "New Century Physics for Queensland" Unit 3 & 4 textbook, Section 10.1 (A) page 274-277. Published by Oxford University Press, 2019.

Smartphones are a great way to collect magnetic field data in solenoids. Richard’s presentation is about how to do two great student experiments on solenoids in electromagnetism without using expensive magnetometers - and how to interpret the results.

Galvanic and electrolytic cells are the staple of student experiments in the Oxidation and Reduction topic around the world. Richard has done them all many times over and will present practical ideas for making sure they work - and how to interpret the results. See also his webpage: seniorchem.com

Fort Bribie, Australia

Indicator Loops

Soda water and headspace pressure

Titration end point using phenolphthalein indicator

Magnetic field vs turns per metre in a slinky (varying L) - collect your own data

Strength of a magnetic field at various distances from a current-carrying wire - collect your data.

Magnetic field vs current in a solenoid: collect your own data

Stacked magnets - ideas for a student experiment

Rolling balls down an incline plane - ideas for a student experiment

13.2 - Fundamental Forces and Gauge Bosons: Doc Walding's "Have no fear" physics video (28:26)

14.2 - Feynman Diagrams: Doc Walding's "Have no fear" physics video (55:03)

14.3 - The Significance of Symmetry: Doc Walding's "Have no fear" physics video (28:13)

14.1B - Conservation of Boson and Lepton Numbers: Doc Walding's "Have no fear" physics video (14:39)

14.1A - Boson and Lepton Numbers: Doc Walding's "Have no fear" physics video(16:05)

13.1B - The Standard Model and Leptons: Doc Walding's "Have no fear" physics video (15:05)