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)
Conductivity, in particular specific conductance, is one of the most useful and commonly measured water quality parameters 3. In addition to being the basis of most salinity and total dissolved solids calculations, conductivity is an early indicator of change in a water system.