Schwinn Tango Review. Overall, I liked the value for the dollar but the performance of the bicycle was way below par due to designed limitations. Top speed is around 10 mph unless you are Lance Armstrong (BMX type gearing).verall, I liked the value for the dollar but the performance of the bicycle was way below par due to designed limitations. Top speed is around 10 mph unless you are Lance Armstrong (BMX type gearing).
Bismuth is a non-toxic heavy metal with a specific gravity of 9.71 (when alloyed with 3 percent tin). Compared to lead with a specific gravity of 11.12, Bismuth is 87 percent as dense as lead. Steel, with a specific gravity of 7.86, is only 71 percent as dense as lead.
Bismuth is a relatively rare metal found in the earth's crust at about the same abundance as silver and almost never occurring in the native state. It is usually associated with copper, lead, tin, wolfram, silver, and gold ores.Major producers of Bismuth are Peru, Japan, Mexico, Bolivia and Canada.ismuth is a relatively rare metal found in the earth's crust at about the same abundance as silver and almost never occurring in the native state. It is usually associated with copper, lead, tin, wolfram, silver, and gold ores.