Resistance Substitution Box Biology_Health & Genetics restoring UV-C output in the

restoring UV-C output in the compatible goggle sanitizer cabinet once the original lamp reaches end of service life

supplied dry so the user adds acid and charges it before running heavy-current electrolysis loads

supplying the standard mid-range value used in the bulk of introductory Ohm's-law and voltage-divider investigations

Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles

Resistance Substitution Box Biology_Health & Genetics restoring UV-C output in theTwelve 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.