Spare 500g Iron Hooked Weight with Retractable Hook Subject_Astronomy Thirty-five-component electronics kit extending the

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

75-inch diameter pendulum bob with a removable threaded hook

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

Eight aluminum-shank tuning forks tuned to scientific pitch (C4 = 256Hz) and ranging from 5 9/16 to 7 1/8 inches

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

Spare 500g Iron Hooked Weight with Retractable Hook Subject_Astronomy Thirty-five-component electronics kit extending theCast 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.