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 found in elemental form or as the sulfide Bi 2 S 3 (bismuthinite) or oxide Bi 2 O 3.It also forms a sulfide with copper called emplectite, CuBiS 2. Bismuth is one of the few elements which can be found in nature in pure form.ts principal use is in making low melting point alloys. Bismuth is found in elemental form or as the sulfide Bi 2 S 3 (bismuthinite) or oxide Bi 2 O 3. It also forms a sulfide with copper called emplectite, CuBiS 2.