How long would it take 150 degree water to reaching freezing point in 2 insulated pipe exposed to 0 degree temperature?

Without knowing how fast the heat leaves the pipe, this cannot be answered.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.