What condition develops when air enters the pleural space from within the lung on inhalation, cannot exit on exhalation, and causes high pressure and lung collapse?

Which one of the following would not be a key in shaping successful urbanization at the turn of the century?

The major goal of the las Gorras Blancas (White Caps) was to:

The Molly Maguires, a group of Irish coal miners in Pennsylvania, used the following tactics to protest working conditions and low wages:

The attempt to disarm a group of Lakota people near this site in South Dakota resulted in members of the Seventh Cavalry of the U.S. Army opening fire and killing over 150 Lakota.

This Hunkpapa Lakota chief urged Native Americans from all neighboring tribes to join his men in defense of their lands and led his warriors to victory at the Battle of Little Bighorn.

This act commissioned the Union Pacific Railroad to build new track west from Omaha, Nebraska, while the CentralPacific Railroad moved east from Sacramento, California.

The founder of the Hull House in Chicago:

Which of the following represents an action that the U.S. government took to help Americans fulfill the goalof western expansion?

What specific types of hardships did an average American farmer not face as he built his homestead in the Midwest?