Answer:
My first is equality; my second is inferiority; my whole is superiority.
If a man carried my burden, he would break his back. I am not rich, but leave silver in my track.
What instrument can make any sound and be heart, but not touched or seen?
Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.
I am believed to be only one dimensional, and tinier than anything can be, and there are many who say that I am the basis of all that we see. What am I?
People take me on walks and I run and have fun. What am I?