The narrowness of the rings of Uranus and Neptune is believed to be caused by a. gravitational interactions between ring particles. b. a spiral density wave which confines them. c. the magnetic field which holds them in place. d. the smaller mass of Uranus and Neptune as compared to that of Saturn. e. small shepherd moons that orbit near the rings.

The narrowness of the rings of Uranus and Neptune is believed to be caused by a. gravitational interactions between ring particles. b. a spiral density wave which confines them. c. the magnetic field which holds them in place. d. the smaller mass of Uranus and Neptune as compared to that of Saturn. e. small shepherd moons that orbit near the rings.

The Solar System

10th Edition

ISBN:9781337672252

Author:The Solar System

Publisher:The Solar System

Chapter15: Uranus, Neptune And The Kuiper Belt

Section: Chapter Questions

Problem 11RQ

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The high-speed winds, high-level white clouds of methane ice crystals, and cyclonic circulations on Neptune are produced by the a. large amount of heat from the sun that is received at Neptune’s distance. b. small amount of heat from the sun and the flow of heat from the interior of the planet. c. strong magnetic field of the planet. d. flow of heat from the interior of the planet. e. unusually rapid rotation of the planet.
Earth-based telescopic observations of Neptune reveal a. a bluish-green disk with no visible surface detail. b. white clouds and a dark blue spot. c. belt-zone circulation as seen on Jupiter and Saturn. d. rapidly rising and sinking convection currents of different shades of blue. e. cyclonic storms near the planet’s equator.
The Cassini division is a large gap in the rings of Saturn. This gap is most likely produced by a. the reflection of sunlight off dark material. b. resonances between ring particles and the moon Mimas. c. shepherding satellites. d. the absorption of sunlight by dark material.
Belt-zone circulation is not easily visible on Uranus because a. no clouds form in the pure hydrogen atmosphere. b. there is no differential rotation. c. clouds form very deep in the atmosphere. d. that atmosphere is stirred by cyclonic circulation. e. there is no liquid metallic core.
The rings of Uranus were discovered a. during an occultation (an eclipse) of a star. b. during an eclipse of one of the moons by the rings. c. during an eclipse of Uranus by the rings. d. as Uranus and the rings passed behind Jupiter. e. by the Voyager 1 spacecraft.
The narrow rings of Neptune are bright in forward-scattered light. This finding indicates that the rings a. contain large amounts of dust. b. are very broad with a lot of material within them. c. contain large, boulder-sized particles. d. are composed of particles that are very bright and probably coated with methane snow. e. are composed of well-organized particles resulting from gravitational resonances.
The synchrotron radiation (radio waves) that astronomers first observed from Jupiter in the 1950's comes from a. deep within Jupiter, in the metallic hydrogen layers b. high speed electrons spirling around the planet's strong magnetic field c. the upper-atmosphere clouds that more quickly near the equator of the planet d. the Red Spot with its tremendous friction
Problem 5. Physical Features of the Giant Planets: Appearance of the Atmosphere of Neptune. Explain why the atmosphere of Neptune appears the way it does.
Surprisingly, the New Horizons probe took pictures of Pluto and found a. ongoing volcanic eruptions b. mountain ranges c. lakes of methane d. a lot of impact craters Pluto and other "dwarf planets" are not considered proper planets because a. they don't have any moons b. they are members of belts like the asteroid and Kuiper belts c. they don't have atmospheres d. their orbital inclinations are too high e. their orbits are too eccentric Which of these planets has never had an artificial satellite? a. Neptune b. Saturn c. Mars d. Jupiter e. Venus
a. Calculate the surface temperature of Pluto and Charon at perihelion, assuming both bodies are rapid rotators and in equilibrium with the solar radiation field. b. Calculate the escape velocity from Pluto and Charon, and compare these numbers with the velocity of N2, CH4, and H2O molecules. c. Given your answers in (a) and (b), explain qualitatively the differences in surface ice coverage for Pluto and Charon.
Because of the lack of a temperature difference between the equator and poles of Jupiter, the a. cyclonic circulations on Earth are duplicated on Jupiter. b. high- and low-pressure regions are drawn into bands by the planet’s rapid rotation. c. belt-zone circulation is only a temporary phenomenon. d. belt-zone circulation is exceptionally stable. e. belt zone circulation is an illusion produced by the interaction of sunlight and chemicals in the Jovian atmosphere.
The odd orbits of Nereid and Triton, which are moons of Neptune, indicate that these a. moons were captured. b. moons formed simultaneously with the planet from the same piece of the solar nebula. c. moons broke off from the rapidly rotating planet. d. moons formed as the result from a giant impact early in the planet’s history. e. orbits were disturbed long ago in an interaction with some other body.

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	a.	gravitational interactions between ring particles.
	b.	a spiral density wave which confines them.
	c.	the magnetic field which holds them in place.
	d.	the smaller mass of Uranus and Neptune as compared to that of Saturn.
	e.	small shepherd moons that orbit near the rings.