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.
up vote 3 down vote accepted. Conductance is the extrinsic property while conductivity is the intrinsic property. This means that conductance is the property of an object dependent of its amount/mass or physical shape and size, while conductivity is the inherent property of the material that makes up the object.