How does a Thermos Flask know when to keep something hot or cold.?

Actually it is not cleaver at all. It holds a vacuum which is resistant to temperature change. If it is cold, it keeps it cold longer than sitting out, and vice-versa for warm.

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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.