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Drag the fulcrum left or right.

Figure 3.06. Lever Rule with weights. The tie line proportions of brine and halite from Figure 3.05 are shown here with a drawing of the lever analogy. A lever is balanced on a fulcrum by weights shown as circles, each with an area that is scaled to its mass. Click on the fulrum and drag it to a different location along the lever. The masses of brine and halite will change to balance the lever in its new location. Notice that the lengths of the lever on the two sides of the fulcrum change in proportion to the masses of the same color. In particular, notice the which side of the lever matches which mass, and that each weight matchs the lever on the opposite side of the fulcrum.