Bell in Vacuum, Glass, AC/DC Biology_Microscopy phase separation

phase separation

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

110 ohms via rotary selector knobs

One-ohm reference resistance coil non-inductively wound from double silk-covered constantan on a plastic rod inside a transparent housing with two terminals at plus-or-minus 1% accuracy

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

Bell in Vacuum, Glass, AC/DC Biology_Microscopy phase separationBell 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.