US$ 42.00
Five-pulley set of tandem low-friction plastic pulleys at 25
Used as the red-rail partner to the 750mm black 4mm lead
Heavy-duty all-metal gyroscope with a 7
used in density investigation
5A single-phase rheostat with cover-protected constantan winding on a 200x56mm tube and 4mm safety sockets
Selenium Photovoltaic Solar Cell Apparatus Item Type_Spoon Five-pulley set of tandem low-frictionSelenium photovoltaic cell on a 4 by 3 by 1. 3 inch base generating voltage under illumination, pairing with a motor unit to trace the full light to electrical to mechanical energy chain.
US$ 42.00
US$ 74.00
US$ 42.00
US$ 11.90
US$ 45.00
US$ 18.00
US$ 42.00
US$ 55.00
US$ 99.00
US$ 39.95