Two charged objects attract one another with a force F. If the charge on both objects is doubled and the distance between them is also doubled, what will be the force between them?
The force between them will be the same.
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The Moon orbits the Earth the Earth orbits the Sun. If the Earth-moon system is ˜1 AU from the Sun and takes ˜1 Earth year to orbit, what is the combined mass of the triple system? Express your answer in solar mass units
a. 1 b. 1.1 c. 1.2 d. 1.3
The calculated Schwarzschild radius of a 2-Mo black hole is approximately
a. 6 km. b. 4 km. c. 2 km. d. 12 km. e. 36 km.
A comet that has a semi-major axis of 100 AU must have a period of about
A. 20 years. B. 100 years. C. 1,000 years. D. 10 years.
A boat is floating in a small pond. The boat then sinks so that it is completely submerged. What happens to the level of the pond?
A. It increases. B. It decreases. C. It stays the same. D. In some cases it would decrease, in others it would stay the same. E. In some cases it would increase, in others it would stay the same.