Who was the swiss psychologist who felt that infants learn according to the formula, "action=knowledge? "?

The persians landed in the plains near athens. as their army greatly outnumbered that of the greeks, the greeks hoped to find aid from nearby sparta. a long-distance runner named pheidippides was sent from athens to sparta to request , but the spartans were not able to send more soldiers at the time. regardless, the greeks were still able to win the battle. centuries later, legend developed that a runner had been sent from the battle to athens after the greek victory. after reaching athens, the runner proclaimed, "we are victorious! " and then fell to the ground and died. this legendary story is the inspiration for the modern long-distance runs that are performed today. this passage refers to the events of which battle during the persian wars? a. battle of thermopylae b. battle of salamis c. battle of plataea d. battle of marathon

Which of the following statements best describes the terms of the treaty of guadalupe-hidalgo? a the treaty ended the mexican-american war, resulting in the u. s. finally being able to finish building railroads in texas. b the treaty ended the mexican-american war, resulting in mexico and the u. s. going back to their pre-war conditions. c the treaty ended the mexican-american war, resulting in the u. s. facing a lot of international backlash for the war. d this treaty ended the mexican-american war, resulting in mexico ceding a large amount of land to the united states.

Which was a problem for american industry in the late 1700s to early 1800s? a. national trade unions b. a shortage of laborers c. child laborers