The 0.18 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by the following equation. x = (11 cm)cos[(15 rad/s)t + π/2 rad)] (a) What is the oscillation frequency? 2.39 Correct: Your answer is correct. Hz (b) What is the maximum speed acquired by the block? 165 Correct: Your answer is correct. cm/s At what value of x does this occur? cm (c) What is the maximum acceleration of the block? cm/s2 At what values of x does this occur? (positive then negative) cm and cm (d) What force, applied to the block, results in the given oscillation? ( N/m)x

Atomic nuclei of almost all elements consist of

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.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration