What is the answer of those questions how i could find the answer?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

Word equation for k(s) +h2o(l) yield koh (aq) + h2

Which of the following is most likely true about water in chemical solutions?