Round Convex Glass Mirror, 50mm Diameter, 50mm Focal Length Plastic Labware_Plastic Measuring Cylinders Plug-type resistance box covering 1

Plug-type resistance box covering 1 ohm to 5000 ohms with 11

5L copper steam generator at 9

used to demonstrate standing waves in air through powder-pile node spacing measurements

Largest-value decade capacitance box stepping 10uF to 100uF in 10uF increments at plus-or-minus 5% on 63V

sized to reconfigure the demonstration meter as a 0-500mA ammeter for general-purpose student bench work

Round Convex Glass Mirror, 50mm Diameter, 50mm Focal Length Plastic Labware_Plastic Measuring Cylinders Plug-type resistance box covering 1Steeply curved convex glass mirror at 50mm diameter and 50mm focal length, ~2. 8mm thick, the diverging surface producing virtual upright reduced images for divergence demos.