Which of the following will she be able to measure using the crest or trough of a single wave? a. the energy; it is only found in the crest or trough of a wave. b. the frequency; it is the distance between crests and troughs. c. the wavelength; it is measured by how fast the crest passes. d. the amplitude; it is measured by the center line of a wave to the crest or trough.

Did the writers of the declaration of independence accomplish their goals (did we get our independence and the new government we wrote about)?

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.

In 1866, a mob in which tennessee city attacked local african americans and burned down homes and schools?