Description

Captive 19mm brass ball on a rod-mounted Gravesande ring

Accurate to 0

Tensioned steel rod in a heavy iron frame breaks a brittle iron cross-rod as cooling contraction pulls it taut

Ten-pack of 16mm steel ball bearings sized as a larger projectile for ramp experiments

Ticker Tape Timer Device with Carbon Disks Physics Captive 19mm brass ball onPlastic cased ticker tape timer at 4. 5 by 3 by 1. 5 inches producing 50 60 dots per second via a vibrating striker, shipped with ticker tape, carbon discs, and a movable disc plug.

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Ticker Tape Timer Device with Carbon Disks Physics Captive 19mm brass ball on

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