Answer:
If you break me, I'll not stop working. If you can touch me, my work is done. 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.
I sleep when you are awake, I am awake when you fall asleep. I can fly but no feathers to aid my flight. What am I?
When set loose I fly away. Never so cursed as when I go astray.
I am an English word that is as long as I am valued. What am I?
What is always coming but never arrives?