It is all in the definition, as my extreme pressure is extreme, but only comes into significance when the hammer strikes the nail head. The pressure is so great that it creates a very loud sound wave from a tiny nail head.
Temperature also has to be extreme to smelt the metal that the nail is made from, as any normal fire will not be enough, it would have to be oxygenated or coked to intensify the heat. You'll notice that when you burn wood with nails in, even though the fire is intense, the nails stay intact.
It is all in the definition, as my extreme pressure is extreme, but only comes into significance when the hammer strikes the nail head. The pressure is so great that it creates a very loud sound wave from a tiny nail head.
Temperature also has to be extreme to smelt the metal that the nail is made from, as any normal fire will not be enough, it would have to be oxygenated or coked to intensify the heat. You'll notice that when you burn wood with nails in, even though the fire is intense, the nails stay intact.