What did the Magdeburg experiment demonstrate about air pressure? A. that atmospheric pressure on the earth's surface has tremendous force

B. that horses are not intelligent enough to understand how to defeat atmospheric pressure

C. that the vacuum inside the two attached hemispheres has tremendous suction

D. that the horses could not get sufficient traction to pull the hemispheres apart

Read the following excerpt from president roosevelt's july 24, 1933, fireside chat. for many years the two great barriers to a normal prosperity have been low farm prices and the creeping paralysis of unemployment. these factors have cut the purchasing power of the country in half. i promised action. congress did its part when it passed the farm and the industrial recovery acts. today we are putting these two acts to work and they will work if people understand their plain objectives. which qualities of effective leadership does roosevelt use in this excerpt? select all that apply. humility communication self-confidence goal setting