Split solar water heating system means solar collector and water tank are splited. Solar collector absorbs solar energy and heat the water or other medium inside of it, then the hot water or medium will heat the cool water in water tank. My house has one split solar water heating system manufactured by Himin Solar, maybe you could log on its website for detailed information.
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.