A 500kg metal rod (A) is lifted to a position at a height of 45m using a ramp. A 2nd 500kg equal metal rod (B) is brought to a position at a height of 45m and lowered by a crane. Which statement is true about their potential 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.