Annealing metal or glass relieves internal stress and toughens it.
Annealing metal or glass relieves internal stress and toughens it.
Normally, liquids contract on cooling & become more dense. However, water contracts when cooled to a temperature of 4oC and thereafter expands as it is cooled further from 4oC to 0oC. Water attains its maximum density at 4oC. This phenomenon is useful for the preservation of marine life in very cold temperatures. Initially, the surface … Read more
Anomalous expansion of Water:
Generally, all liquids expand due to heating. But water behaves in a peculiar way when heated from 0oC to 4oC. On heating from 0oC up to 4oC its volume decreases, reaches a minimum at 4oC such that the density of water is maximum at 4oC on heating further, water behaves like … Read more
