Why changes of state are considered physical transition and not chemical processes

In a physical change, the chemical compontents are not altered. If ice melts into a liquid it's still water regardless; same goes if it were to vaporize and turn into a gas.

In a chemical change, the chemical components are altered. If you left a metal outside after it rained it would rust which would be a chemical process since it is chemically altered. Flamability is also a chemical process.

1.solid

2.carbon dioxide

3.helium

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.