A light ray in air passes through a block of glass. What can be stated with regard to its speed after it emerges from the block?
A. Speed is less than when in glass
B. Speed is less than before it entered glass
C. Speed is same as that in glass
D. Speed is same as that before it entered glass

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.