Uranus and Neptune have methane clouds but Jupiter and Saturn do not. Which factor explains why?
A) Temperatures on Jupiter and Saturn are too high for methane to condense.
B) Jupiter and Saturn do not contain any methane gas.
C) The rapid rotation of Jupiter and Saturn prevents methane clouds from forming.
D) The stronger gravity on Jupiter and Saturn pulls methane downward so that it can't form clouds.
A) Temperatures on Jupiter and Saturn are too high for methane to condense.
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Rotational velocity outside the visible boundary of our Galaxy is ________ than would be expected on the basis of observed stars and gas, indicating the presence of ________.
A. higher; dark matter B. smaller; white dwarfs C. zero; a vacuum D. lower; gas
What can we conclude about the structure of Earth's interior knowing that the average density of Earth is higher than the average density of the rock on the continents and seafloor?
A) That Earth's most dense material must be water B) That Earth's most dense material must be the seafloor and the continents C) That Earth's most dense material must be beneath the surface D) That Earth's least dense material must be the seafloor and the continents E) That Earth's least dense material must be beneath the surface
The buoyant force on an object is less when the object is
A) only partly submerged. B) submerged near the surface. C) submerged near the bottom. D) none of the above
Consider a square which is 1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 ?C at (0, 0); +4.0 ?C at (1, 1); +3.0 ?C at (1, 0); -3.0 ?C at (0, 1)
What is the magnitude of the electric field at the square's center? A) 1.1 × 105 N/C B) 1.3 × 105 N/C C) 1.5 × 105 N/C D) 1.7 × 105 N/C E) 1.9 × 105 N/C