Largely it depends on the resistance of the coils you are using in your atomizer. Here is an online Ohms Law Calculator to figure out the voltes you are vaping at: http://www.ohmslawcalculator.com/ohms-law-calculator Just enter the resistance of your coil and then 40watts and it will tell you how many volts you are using.
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.