Answer:
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
I am round. I have only one line. Circle is not my name indeed. 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.
Born of sorrow, grows with age, you need a lot to be a sage. What is it?
While you were folding a letter you got me. Usually you will do whatever it takes to avoid me but now you can't help but find me.
A word of five letters, Upside down is the same, A shark does this, But itβs not to blame. What is the word?