Both Jean and Sandra are A students at a university, and both major in general studies. Jean takes an introduction to physics course after having completed a chemistry course the previous semester. Sandra takes the same physics course without having previously taken any other college-level science course. Sandra has a much more difficult time learning the material than Jean does. Jean's learning was probably facilitated by

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a study of twenty 4th grade classrooms in which researchers ask the schools to systematically vary the time of day reading is taught, and collect weekly assessments of reading comprehension for each child over a three-month period. the collection of data, by a playground designer hired by the superintendent of schools, about the physical dimensions of school playgrounds, presence of fencing, and the kinds of equipment currently provided. a feasibility study for implementing a year-round school program, focusing on economic issues such a facilities utilization and transportation costs. an analysis of aggregate data comparing statewide high school graduation rates provided by the state department of public instruction, using county tax information.

Anode is a point on a wave where there is no vibration. a. true b. false

Which important event brought about the first peacetime draft in the united states? a. the vietnam war b. the civil war c. world war ii d. world war i