Pershing's push into Mexico was called a ""punitive expedition"" a. so that it would not be mistaken for an invasion. b. because we wanted Mexico to believe it was a war. c. because we wanted everyone to know it was a very small operation. d. because we wanted the world to know we were punishing Germany.

Which civil rights act banned discrimination against any person based on race or color? 14th amendment 15th amendment civil rights act of 1964 voting rights act of 1965

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

What greek scientist created a screw to move water for irrigation?