Ammeter - Measures current, placed in series, Voltmeter - Measures potential difference, placed in parallel, 30 cm ruler - Measures shorter distances, Metre rule - Measures distance between 50 cm to about 2 m, Tape measure or trundle wheel - Measures distances greater than 2 m, Newton meter - Measures force or weight, Mass balance - Measures mass, Stopwatch - Measures time, less accurate for smaller times, Light gate - Measures time, need two, Data Logger - When connected to a lightgate measures time, velocity, or acceleration,

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