Aboxcar of length 10.1 m and height 2.4 m is at rest on frictionless rails. inside the boxcar (whose mass when empty is 3500 kg) a tank containing 1500 kg of water is located at the left end. the tank is 1.1 m long and 2.4 m tall. at some point the walls of the tank start to leak, and the water fills the floor of the boxcar uniformly. assume that all the water stays in the boxcar. after all the water has leaked out what will be the final velocity of the boxcar? (take movement to the right as positive. assume that the mass of the boxcar is evenly distributed.)

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.