Through the vibration of particles in a medium.
Rust on a nail is a chemical change.
Ice melting IS a physical change. Ice is made of water, when you melt ice its still water. Just in a different physical state.
This would be the coffee machine in the break room. Because the chloroplast creates energy from the sun. and this creates energy from coffee beans to give to the employees
2Na(g) + Cl2(g) 2NaCl(s) is the redox reaction. Na atoms lose electrons and Cl atoms gain electrons, thereby getting oxidized and reduced respectively and fulfilling the requirement of a redox reaction.