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10 questions from this quiz
Always attractive
Gravity only attracts; electric can repel
Proportional to product of masses
Becomes one-fourth as strong
Becomes one-ninth as strong
6.674×10−116.674 \times 10^{-11}6.674×10−11 Nm2^22/kg2^22
Distance between centres of masses
Equal magnitude, opposite direction
Towards centre of each mass
Understanding orbits
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