The drawing shows three situations in which a block is attached to a spring. the position labeled "0 m" represents the unstrained position of the spring. the block is moved from an initial position x0 to a final position xf, the magnitude of the displacement being denoted by the symbol s. suppose the spring has a spring constant of k = 43.8 n/m. using the data provided in the drawing, determine the total work done by the restoring force of the spring for each situation. in the case of zero put your result as "+0".

A- a of 8.00 cm a of 34.0 nc. a , -, a of 25.0 nc is on of a of 15.0 cm .be toto aof ? a) b) c) j d) e)

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.

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s