IMathAS-libretexts

The buoyant force on a block submerged in salt water is greater than the buoyant force on the block when it is submerged in tap water. Which of the following describes the microscopic cause of this difference?

The electrostatic force between the nuclei in the molecules in the block and the electrons in the molecules of the salt water is greater than the force between the nuclei in the molecules in the block and the electrons in the molecules of the tap water.
The electrostatic force between the electrons in the molecules in the block and the electrons in the molecules of the salt water is greater than the force between the electrons in the molecules in the block and the electrons in the molecules of the tap water.
The gravitational force between the molecules in the block and the molecules of the salt water is greater than the force between molecules in the block and the molecules of the tap water.
The electrostatic force between the nuclei in the molecules in the block and the nuclei in the molecules of the salt water is greater than the force between the nuclei in the molecules in the block and the nuclei in the molecules of the tap water.

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