29 June 2022

Ore on a Stick


 One of the easiest ways of extracting small amounts of ore - powdered rock on a stick. Works well with Malachite and Iron ore haematite. Copper sometimes get small balls 0.5mm and the iron get good iron filings

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A-Level Physics: AC Theory, RMS Voltages – and Why 230 V Isn’t 230 V at All

 A-Level Physics: AC Theory, RMS Voltages – and Why 230 V Isn’t 230 V at All When students first meet alternating current in A-Level Physics...