Gordon throws a baseball into the air. it rises, stops when it reaches its greatest height, and then falls back to the ground. at what point does the kinetic energy converted to potential energy? a. while the baseball is rising b. while the baseball is falling c. while the baseball sits i the ground d. while the baseball is stopped in the air

That would be when the baseball is rising. The energy from the throw is kinetic energy.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.