Giant Human Ear Model, 5X Life Size Handle Type_Wood sized to drop different loads

sized to drop different loads into a circuit without rewiring

and mechanical-advantage experiments

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

Zinc alloy natural gas Bunsen burner with flame stabilizer ships with a 2-foot neoprene gas hose for quick bench hookup in chemistry classrooms

this metal wave apparatus pairs the rotary handle with a degree scale so students can read phase against vertical displacement

Giant Human Ear Model, 5X Life Size Handle Type_Wood sized to drop different loadsFive times enlarged ear model reveals cochlear canal, ossicles, and vestibular structures at visible scale for group classroom demonstrations of auditory anatomy.