Whic type of reaction is used in the production of nylon

What is the independent variable in this investigation? mass volume sample number substance density

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?