Rheostat. an electric device for controlling and limiting current or voltage in an electric circuit. The principal component of a rheostat is a conducting element with variable resistance.The magnitude of this resistance may be varied smoothly or in discrete steps.heostat. an electric device for controlling and limiting current or voltage in an electric circuit. The principal component of a rheostat is a conducting element with variable resistance. The magnitude of this resistance may be varied smoothly or in discrete steps.
troy ounce: $992.00: $990.00: Rhodium : Rh : troy ounce: $1860.00: $1860.00: Iridium : Ir : troy ounce: $990.00: $990.00: Ruthenium : Ru : troy ounce: $200.00: $200.00: Osmium : Os : troy ounce : $400.00: Rhenium : Re : pound : $1290.00: Gold : Au : troy ounce : $1323.90: Silver : Ag : troy ounce : $16.450 : Last update:
In January 1997, the rhodium price sank to $200 per ounce, its lowest level in nearly 24 years. Prices began to rise again in June, reaching a peak of $370 per ounce, as delayed shipments from Russia caused a shortage of supply.The price retreated to $300 per ounce in August but rallied to $360 at yearend, following speculative buying in the United States. To convert to dollars per kilogram, multiply by 32.1507. Note: 1911-29, New York price of refined metal, in Hill, J.M., 1922, The marketing of platinum: Engineering & Mining Journal-Press, p. 718. 1930-66, Producer price at New York of 99.9%-pure palladium, in Engineering & Mining Journal, Mineral and Metal Markets.