US$ 41.98
supplied dry so the user adds acid and charges it before running heavy-current electrolysis loads
Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles
restoring UV-C output in the compatible goggle sanitizer cabinet once the original lamp reaches end of service life
bare copper
Resistance Substitution Box Biology_Health & Genetics supplied dry so the userTwelve position substitution box rotating through 100 ohms to 470k ohms at 1W and plus or minus 1%, dropping a known resistance into a circuit without rewiring during Ohm's law work.
US$ 41.98
US$ 20.21
US$ 16.46
US$ 40.00
US$ 15.98