Although the atmospheres of Uranus and Neptune are very similar, the atmosphere of Neptune contains more:
A) Hydrogen.
B) Helium.
C) Methane.
D) Ammonia.
E) Nitrogen.
C
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Which of the following kinds of stars is most dense?
a. a supergiant star b. a main sequence star c. a giant star d. a white dwarf e. the sun
Projectile Motion: A projectile is fired from ground level with a speed of 150 m/s at an angle 30° above the horizontal on an airless planet where g = 10.0 m/s2. What is the horizontal component of its velocity after 4.0 s?
A. 150 m/s B. 35 m/s C. 130 m/s D. 75 m/s E. 38 m/s
If the carbon dioxide in Earth's rocks were suddenly released into its atmosphere, what would happen?
a. It would rapidly escape into space. b. It would dissociate into carbon and oxygen. c. It would collect as ice on the north and south poles. d. It would cause a runaway greenhouse effect.
The charge on the proton is the same as
A) the charge on the neutron. B) the charge on the neutron, but of the opposite sign. C) the charge on the atom. D) the charge on the electron. E) the charge on the electron, but of the opposite sign.