Find out whether these phenomena are reversible or not.
(i) Waterfall and (ii) Rusting of iron.
(i) Waterfall The falling of water cannot be reversible process. During the water fall, its potential energy
convert into kinetic energy of the water. On striking the ground, some part of potential energy converts into heat and sound not possible that heat and the sound. In nature, it is automatically convert the kinetic energy and potential energy so that the water will rise back so waterfall is not a reversible process.
{ii) Rusting of iron: In rusting of iron, the iron become oxidised with the oxygen of the air as it is a chemical reaction, it cannot be reversed. d potential energy so that the water will rise back so waterfall is not a reversible process.