Which change was a way Native Americans modified their environment to meet their needs?

They built railroads around mountains.

They developed irrigation systems.

They grew maize and potatoes.

They built a canal system for transportation.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.

What is a monomer? how do they form a ploymer from the view point of chemical bonding?