Spare 500g Iron Hooked Weight with Retractable Hook Subject_Astronomy Seven-junction copper-and-iron thermopile from four

Seven-junction copper-and-iron thermopile from four 130mm wires of each metal

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

75-inch diameter pendulum bob with a removable threaded hook

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

the high-concentration AgNO3 reagent for halide-precipitation tests

Spare 500g Iron Hooked Weight with Retractable Hook Subject_Astronomy Seven-junction copper-and-iron thermopile from fourCast 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.