Toy car on a ramp: how to test the effect of slope on descent time
A school experiment using a fixed distance, controlled contact conditions, five trials per slope, and video-based timing.
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Experiments involving forces, light, sound, heat, pressure, density, fluids and other observable physics phenomena.
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Does a lemon battery really work? How to measure voltage, current, and power
A practical guide to turning a lemon battery into a quantitative experiment by measuring open-circuit and loaded voltage, current, power, and the reasons an LED may stay dark.
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