Anything that has volume or mass is matter.
A testable explanation that is supported or refuted is hypothesis.
This is two or more equations with common variables, also known as a linear system. System Of Equations
<span>The nationalists lost and the communist took over.</span>
What economic and social problems are faced by citizens
Answer:
Factory smoke and other conditions
Explanation:
Back in the second industrial revolution there were many factories being built, and there were a lot of people willing to work for lower wages. Conditions were harsh, as there was a lot of smog, factory smoke, etc. and many people were harmed by the many machines in factories that had no safety precautions. Also, the gases and smoke caused breathing and lung illnesses.