Instructions: select all the correct answers. in what three ways did the chinese develop the perpetual calendar wan-nien-li? they observed the sun's longitude and the moon's phases. they used measurements from a sundial and a water clock. they determined the dates of the two solstices in a year. they mapped the constellations in the night sky. they surveyed citizens about how many days there should be in a year.

Which struggle to place between colonist and soldiers in boston on march 5, 1770

Aresearcher conducting behavioral research collects individually identifiable sensitive information about illicit drug use and other illegal behaviors by surveying college students. the data are stored on a laptop computer without encryption, and the laptop computer is stolen from the researcher’s car on the way home from work. this is an unanticipated problem that must be reported because the incident was (a) unexpected (i.e., the researchers did not anticipate the theft); (b) related to participation in the research; and (c) placed the subjects at a greater risk of psychological and social harm from the breach in confidentiality of the study data than was previously known or recognized. according to ohrp, this unanticipated problem must be reported to the irb in which timeframe? promptlywithin 48 hourswithin 24 hourswithin two weeks

One result of recent migration trends is that the workforce in europe has become