Congress forcing a compromise(d) Space Shuttle design on NASA. Among other things, the space shuttle was the first human space vehicle to use solid rocket boosters. Solid rocket boosters were previously deemed unsafe for human space flight because once they're lit, they don't stop boosting until the fuel is gone. Liquid-fueled rockets can be shut off.
Definition of conductive. : having conductivity : relating to conduction (as of electricity)
Electrical conductivity is the inversion of resistivity, and is a measure of how well a material conducts electric current: in which Ï is the conductivity of the material expressed in Siemens per meter (S/m). In electrical engineering often Îº (kappa) is used instead of Ï.