Over the last ten years, nearly 90% of medical graduates from konesia have left the country for higher-paying jobs in the united states. what phenomenon has konesia been witnessing?

Katie and her father are looking at the pipes around their house. they find that some of the pipes have rust on them, making them look and feel different than normal pipes. what kind of change have the rusted pipes gone through? a. a physical change b. a vibration change c. a chemical change d. a temperature change