In a roller coaster, a car has x joules of potential energy when it is resting at the top of the hill. the car moves downhill and reaches the bottom of the hill, where it moves quickly. assuming no friction, what does the law of conservation of energy predict about the car?

a)at the bottom, the car has x joules of potential energy.
b)at the bottom, the car has x joules of mechanical energy.
c)at the bottom, the car has more than x joules of kinetic energy.
d)at the bottom, the car has more than x joules of mechanical energy.

Asubject in a clinical research trial experiences a serious, unanticipated adverse drug experience. how should the investigator proceed, with respect to the irb, after the discovery of the adverse event occurrence? a. do not report the adverse drug experience to the irb since it is a common adverse experience. b. report the adverse drug experience to the irb only if there are several other occurrences. c. report the adverse drug experience as part of the continuing review report. d. report the adverse drug experience in a timely manner, in keeping with the irb's policies and procedures, using the forms or the mechanism provided by the irb.