Hello everyone, Today I saw some waves in my physics lessons. A stone drops into water, and waves are created and spread from source to surroundings. Finally, the water became calm again. What's the most proper explanation for that? I think: Water molecules gain energy after being hitting, they collide the others. By law of conservation of momentum, it is rather obvious to see the total amount of kinetic energy decreases after a collision. Finally, it becomes 0. Is my explanation correct?