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:
The price of gold is not fixed, but varies according to demand. On October 1, 2010, a troy ounce of gold was worth about $ 1315.00 USD (see below for pounds). On October 1, 2015, a troy ounce of gold was worth about $ 1120.00 USD.Between those dates, one-ounce gold prices were as high as $ 1895 and as low as $ 1066.20 pounds of 18 karat gold is currently worth $3,015,512.49 (= $4,020,683.32 x .75). Twenty-two karat gold, which is quite rare for jewelry, is 91.7% pure. 220 pounds of 22 karat gold is currently worth $3,686,966.60 (= $4,020,683.32 x .917).