HELP ME PLS!! After fall of the Empire from #1 and then the collapse of Charlemagne's Empire, what conditions in Europe made it necessary for a system like Feudalism to be put in place?

How is government in the united states like that of ancient athens?

How important is it to have a powerful army and navy? give two reasons for your answer

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design