What two forces act in the nucleus to create a 'nuclear tug-of-war'? a. covalent bond, ionic bond c. van der waals force, dipole b. electrostatic repulsion, strong nuclear force d. all of the above

B. Electrostatic repulsion, strong nuclear force

Explanation:

Nuclei, forces include electrostatic and acts as repulsion between protons.

The other is force is Nuclear force between two neutrons. This nuclear force is a short range force and is so strong that it negates the effect of the force of repulsion between the protons and helps bind the nucleus together.

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answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

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