Describe how an equal-arm balance is made and how it works

Two pans of equal weight are suspended from the beam, one at each end, at the fulcrum (a type of lever). A pointer on the right angles to the beam and leaver indicates zero on a scale when the beam is at rest, parallel  to a level surface.

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Answer it was we, the the whole people, who formed the union. and we formed it, not to give the blessings of liberty, but to secure them: not to the half of ourselves and the half of our posterity, but to the whole people- women as well as men.