What was the effect of discovery of quinine in the 1820s?

Which statement best evaluates the impact of the 1929 stock market crash on europe? 1. the united states established high export tariffs to europe that reduced goods exported to germany. 2. the united states promoted domestic policy initiates that reduced jobs on american bases in europe. 3. the united states promoted isolationism that withdrew troops from europe causing germany to pay its own national defense. 4. the united states eliminated loans to europe that caused germany to default on its reparation payments to france.

How did german physicist werner heisenberg's uncertainty principle shake beliefs in newtonian physics?

6. why did louis xvi call a meeting of the estates-general in 1789? how long had it been since such a meeting had been called?