Satellite Motion: The captain of a spaceship orbiting planet X discovers that to remain in orbit at 410 km from the planet's center, she needs to maintain a speed of 68 m/s. What is the mass of planet X? (G = 6.67 × 10-11 N ? m2/kg2)
A. 2.8 × 1019 kg
B. 4.2 × 1017 kg
C. 2.8 × 1016 kg
D. 4.2 × 1014 kg
Answer: A
You might also like to view...
Mid-sized black holes of a few thousand solar masses have been found in the cores of some
a. open clusters. b. emission nebulae. c. elliptical galaxies. d. globular clusters. e. dark molecular clouds.
A taxicab moves five blocks due north, five blocks due east, and another three blocks due north. Assume all blocks are of equal size. How far is the taxi from its starting point?
a. 13 blocks b. 9.4 blocks c. 9.2 blocks d. 8.6 blocks
The reason the north pole of a bar magnet free to rotate points north is because
a. the south geographic pole of the earth is the earth's magnetic north pole. b. the south geographic pole of the earth is the earth's magnetic south pole. c. there is a net accumulation of negative magnetic charge at the earth's south geographic pole. d. there is a net accumulation of positive magnetic charge at the earth's north geographic pole. e. the north geographic pole of the earth is the earth's magnetic north pole.
An object is released from rest when it is a height h above the surface of a planet of mass M and radius R. What is the speed of the object just before striking the surface of the planet? Neglect any air resistance. Let h = 4.0 × 10^6 m, R = 5.0 × 10^6 m, and M = 4.0 × 10^24 kg
a. 7.8 km/s b. 3.5 km/s c. 5.4 km/s d. 6.9 km/s e. 4.8 km/s