Concave Glass Mirror, 50mm Diameter, 50mm Focal Length Subcategory_Stopwatches and Timers this resistor module on a

this resistor module on a demonstration base with 4mm plug connections drops into series with bulbs and LEDs in student circuits

Aluminum-cast Young's-modulus frame with bubble level

paired with two 50N spring balances and two wrest pins so students can verify the laws governing frequency

and a motor accessory

supporting 18 mm thermometers upright and protected between laboratory uses

Concave Glass Mirror, 50mm Diameter, 50mm Focal Length Subcategory_Stopwatches and Timers this resistor module on aConcave glass mirror at 50mm diameter and 50mm focal length, ~3. 3mm thick, the strongly curved surface (R=100mm) producing magnified real images for image formation experiments.