Answer:
My full powers come when my makers are dead. I await a heavy hat to put on my head. What am I?
I am a bow that can never be tied or broken but can disappear. What am I?
I start in little but I end in full you'll find me in half and complete.
I am full of holes but still hold water. What am I?
Physicists have built devices to move me very fast. My last seven letters can be commonly found in newspapers magazines and journals.
It weighs next to nothing but no one can hold it for long. What is it?