A 5,000 kg satellite is orbiting the Earth in a circular path. The height of the satellite above the surface of the Earth is 800 km. The time it takes for the satellite to travel around the Earth is 
A. 0.750 hours.
B. 0.950 hours.
C. 1.25 hours.
D. 1.68 hours.
E. 2.01 hours.
D. 1.68 hours.
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A boy scout will be burned more severely by
A) 100 g of water at 100°C. B) 100 g of steam at 100°C. C) both about equally D) neither of these
The purpose of prescription glasses for a near-sighted person is to bring the apparent positions of distant objects
a. to the far point of the eye b. to the near point of the eye c. to the retina of the eye d. none of the above
Magnesium bromide superconductors will revolutionize the electricity distribution system
What will be an ideal response?
A very massive body A and a less massive body B move toward each other under the influence of gravity. Compared to the force on A, the force on B is
1) greater. 2) the same. 3) less. As A and B get closer and closer, each experiences an increase in 4) velocity. 5) acceleration. 6) force. 7) all of these. 8) none of these.