Determine the buoyant force acting on the block
A 15N block is now immersed in a salt water (density = 1030 kg/m3). Determine the buoyant force acting on the block if the spring scale reads 11.5 N.
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How do the pressure and the number of molecules inside the bubble scale with the radius R of the bubble? Assume the surface tension \gamma is known and you can model the bubble/air as an ideal gas.
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