Spare 500g Iron Hooked Weight with Retractable Hook Subject_Astronomy Free-standing life-size male urinary tract

Free-standing life-size male urinary tract model exposes kidneys

Thirty-five-component electronics kit extending the Electronics System 1 set with capacitors

the larger geometry pushing pole separation wide enough that field lines extend visibly beyond the magnet body for filing maps

bending measurably under heat as differential thermal expansion of the two bonded metals drives the visible curvature

Converts chemical energy to electrical through a zinc-copper-sulfate redox couple

Spare 500g Iron Hooked Weight with Retractable Hook Subject_Astronomy Free-standing life-size male urinary tractCast iron 500g mass carries a retractable hook for suspension from spring scales, pulleys, or beams, serving as a replacement piece for gravitational and force measurement setups.