Plz help! What is the relationship between the length of a lever and the force required? (where should the fulcrum be to get the best advantage?)

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The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

The answer to your question would be c. mineral oil