Description

for side-by-side period-versus-mass comparisons across three materials

demonstrating how sound transmission weakens as the air is evacuated

and raised-graduated for shatterproof bench use

four magnet-mounted pulleys

the standard spectrometer integrates collimator

Demonstration Electroscope Capacity_50mL for side-by-side period-versus-mass comparisons acrossLarge 150mm ring with charging ball and condenser plates on an insulated rod, sized so the leaf deflection stays visible from the back of the room during whole class electrostatics demos.

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Demonstration Electroscope Capacity_50mL for side-by-side period-versus-mass comparisons across

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