.
A. depend on charge.
B. act only when objects are touching.
C. depend on mass.
D. are field forces.
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A. Gravitational force is stronger than electric force.
B. Electric force can both attract and repel.
C. Electric force is inversely proportional to the square of the distance between objects.
D. Gravitational force exists between objects that are not touching.
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A. The inverse square distance law applies.
B. Forces are proportional to physical properties.
C. Potential energy is a function of distance of separation.
D. Forces are either attractive or repulsive.
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A. FE < FG
B. FE = FG
C. FE > FG
D. If the charges on the spheres are of the same sign, then FE > FG ; but if the charges on the spheres are of opposite sign, then FE < FG.
E. Cannot be determined without knowing the distance between the spheres
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A. the gravitational force is a lot stronger
B. the electric force is a lot stronger
C. the two types of forces are the same
D. they cannot be compared
E. the electric force is slightly stronger
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