Answer:
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
Three little letters. A paradox to some. The worse that it is, the better it becomes.
What force and strength cannot get through. I, with a gentle touch, can do. Many in the street would stand. Were I not a friend at hand.
A hole in a pole, though I fill a hole in white. I'm used more by the day, and less by the night.
Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.