It IS <span>PE = (1200 kg)(9.8 m/s²)(42 m) = 493,920 J </span>
Convection is the process in which heat is transferred by movement of a heated fluid such as air or water. Natural convection results from the tendency of most fluids to expand when heated so it becomes less dense and rise above.
For example- In a pot of water on a stove the liquid t bottom is heated by conduction. The hot water has lower density and it rises above pushing the cold water downwards so it gets heated.
Answer:
Physical changes are changes affecting the form of a chemical substance
Explanation:
