What are 2 reasons for free speech during war, and 2 reasons against free speech during war? (4 total)

Explain the difference between a physical change and chemical change

Ineed to try to get this right so i can get a good grade so can someone me

Look at the map of cities in the united states at the turn of the twentish century what impact did railroads have on cities across the united states at the turn of the twentish century