Arock is thrown upward from level ground in such a way that the maximumheight of its flight is equal to its horizontal ranger. a) at what angleθis therock thrown? b) in terms of its original ranger, what is the rangermaxtherock can attain if it is launched at the same speed but at the optimal anglefor maximum range? c) would your answer to part a) be different if the rockis thrown with the same speed on a different planet? explain.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

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.

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your