Cause of Challenger Disaster Revealed. William P. Rogers, head of the special commission appointed by President Ronald Reagan to investigate the January 28, 1986, explosion of the space shuttle Challenger, reports his findings at a press conference on June 9, 1986. Cause of Challenger Disaster Revealed. Share.  William P. Rogers, head of the special commission appointed by President Ronald Reagan to investigate the January 28, 1986, explosion of the space shuttle Challenger, reports his findings at a press conference on June 9, 1986.
conÂ·ducÂ·tivÂ·iÂ·ty. n. pl. conÂ·ducÂ·tivÂ·iÂ·ties. 1. The ability or power to conduct or transmit heat, electricity, or sound. 2. The conductance of a material. 3. Physiology The conductibility of a structure, especially the ability of a nerve to transmit a wave of excitation.
By Anne Marie Helmenstine, Ph.D. Electrical Conductivity Definition: Electrical conductivity is the measure of the amount of electrical current a material can carry.Electrical conductivity is denoted by the symbol Ï and has SI units of siemens per meter (S/m).Most Conductive Element.y Anne Marie Helmenstine, Ph.D. Electrical Conductivity Definition: Electrical conductivity is the measure of the amount of electrical current a material can carry.