A9-kg object is at rest. suddenly, it explodes and breaks into two pieces. the mass of one piece is 6 kg and the other is a 3-kg piece. which one of the following statements concerning these two pieces is correct?

a. the speed of the 6-kg piece will be one eighth that of the 3-kg piece.
b. the speed of the 3-kg piece will be one fourth that of the 6-kg piece.
c. the speed of the 6-kg piece will be one forth that of the 3-kg piece.
d. the speed of the 3-kg piece will be one half that of the 6-kg piece.
e. the speed of the 6-kg piece will be one half that of the 3-kg piece.

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.