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1 mark
1 markA helium nucleus approaches a gold nucleus. An electric force and a gravitational force act on each nucleus.
Which statement about these forces is not correct?
The electric force between the nuclei is repulsive.
The electric force is always smaller than the gravitational force.
Both forces increase as the nuclei approach.
The gravitational force between the nuclei is attractive.
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. Callisto, a moon of Jupiter, has the same radius as Mercury but only one third of its density.
