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

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

Meker-style natural gas burner delivers a broad

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

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.