Bell in Vacuum, Glass, AC/DC Biology_Microscopy this ten-piece brass hooked weight

this ten-piece brass hooked weight set pairs five 50-gram and five 25-gram pieces with retractable hooks on both ends

supported on die-cast end pieces with a nickel-plated phosphor-bronze sliding contact

Five-cylinder equal-mass set with hooks in copper

1100-turn copper coil on a bobbin sized for a double C-core

protecting the wooden edges during daily classroom handling and extending the usable life of the measurement tool

Bell in Vacuum, Glass, AC/DC Biology_Microscopy this ten-piece brass hooked weightBell in vacuum jar with a 15cm electric bell on 4 6V AC DC suspended inside a 20 by 10cm glass chamber, demonstrating that sound requires a medium to propagate.