Steel Extension Spring, 56 x 19mm Subcategory_Rulers and Measuring providing a high-density bob for

providing a high-density bob for pendulum and collision-momentum student investigations

Range 10Hz to 300Hz/sec

Auxiliary accessory set for the demountable transformer system

Slidable electromagnet on this 6V drive lets students vary amplitude while the chrome-plated steel prongs (10 x 25 x 300mm) sustain an accurate 60Hz vibration on a horizontal or vertical base

Steel Extension Spring, 56 x 19mm Subcategory_Rulers and Measuring providing a high-density bob for19mm diameter steel extension spring at 56mm rest length, stretching to approximately 290mm under load, sized for hands on Hooke's Law measurement with hanging weights.