Which statement about planetary rings is not true?
A) Rings are always located closer to a planet's surface than any large moons.
B) Individual ring particles orbit their planet in accord with Kepler's laws, so that particles closer in orbit faster than particles farther out.
C) Saturn's rings formed along with its moons 4.6 billion years ago.
D) All four jovian planets have rings.
C
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Doubling both charges changes the potential energy for a pair of point charges by a factor of
A. 2. B. 4. C. 1?2. D. 1?4. E. 1 (no change).
Satellite Motion: Find the orbital speed of an ice cube in the rings of Saturn. The mass of Saturn is 5.68 × 1026 kg, and use an orbital radius of 1.00 × 105 km. (G = 6.67 × 10-11 N ? m2/kg2)
A. 19.5 km/s B. 27.5 km/s C. 13.8 km/s D. 9.40 km/s
An ideal fluid, of density 900 kg/m3, flows at 4.80 m/s through a level pipe with radius of 0.22 cm. The pressure in the fluid is 1.3 × 10^5 N/m2 . This pipe connects to a second level pipe, with radius of 0.72 cm. Find the speed of flow in the second pipe
a. 51 m/s b. 1.5 m/s c. 0.45 m/s d. 16 m/s e. 4.9 m/s
Exhibit 17-1
The figure below shows a sine wave at one point of a string as a function of time.
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Use the exhibit to answer the following question(s).
Refer to . Which of the graphs below shows a wave where the amplitude and frequency are each reduced in half?
a.
