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.
Melting Point: 520.52 F (271.4 C) Boiling Point: 1,564 F (1,564 C) Word origin: The term bismuth comes from the German words weisse masse, meaning white mass. Discovery: French chemist Claude Geoffroy the Younger showed it to be distinct from lead in 1753. Properties of bismuth. Bismuth is a brittle, crystalline metal that occurs in its native state.