Answer:
I start with an E end with an E and have a letter in me.
I am heavy forward, but backward I'm not. What am I?
My full powers come when my makers are dead. I await a heavy hat to put on my head. What am I?
What is shaped like a box, has no feet, and runs up and down?
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.