Which statement is true about magnetic field lines? A. There is no consistent pattern in the lines.
B. The lines point away from the south pole of a magnet and toward
the north pole.
O c. The lines form a loop from the north pole back to the north pole
and from the south pole to the south pole.
D. The lines point away from the north pole of a magnet and toward
the south pole

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

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.