okay so basically given the digram below you need to solve for the mass in grams of the 4 unknowns (M1, M2, M3,Mmg). The only known mass is Mnut=16g, and the lengths of the rods used. basically we had to make a mobile and equally balence objects and then determine their masses

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.