What happened to the more than 1,000 African Americans who were lynched in the south during the 1890s?

Why do all market economies have taxes to support armed forces police forces public schools and at least some form of public transportation?

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?

Radiation was first detected by a ?