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What is physically going on when I stick my finger in a glass of water and the scale tips downards implying it got heavier?

By placing your finger in the water, you are exerting a force and the water responds to that force by rising higher in the glass. That force adds to the apparent weight of the water/glass system. If ...
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What is physically going on when I stick my finger in a glass of water and the scale tips downards implying it got heavier?

At a macroscopic level there is a buoyancy upthrust acting on your finger, the reaction to which causes an increased force on the scale. At a microscopic level the effect is no different to putting a ...
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What is physically going on when I stick my finger in a glass of water and the scale tips downards implying it got heavier?

I'm not sure whether the previous answers address your interest in the molecular understanding of the change . The stress tensor tells us that pressure is momentum flux. The kinetic flux hasn't ...
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