Brief increases in atmospheric sulfur in Venus's atmosphere may be due to
A. chemical reactions between sulfuric acid clouds and the surface.
B. cloud-to-cloud lightning in Venus's atmosphere.
C. a large meteor entering Venus's atmosphere.
D. a volcanic eruption on Venus's surface.
Answer: D
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Which of the following statements is true of Uranus when compared with Jupiter or Saturn?
A) Like Jupiter and Saturn, it radiates about the same amount of energy that it receives from the Sun. B) It has much less heat flowing out of its interior than Jupiter or Saturn. C) The composition of liquid metallic hydrogen in Uranus is similar to that of Jupiter and Saturn. D) Like Jupiter and Saturn, it rotates on its side, with its equator inclined about 25 degrees to its orbit.
A deep space probe moving forward in space needs to make a course correction and so fires a thruster on the side of the probe 90° away from its direction of motion, as shown below. This thruster, while on, exerts a constant force on the probe perpendicular to its original direction of motion. While the thruster is operating, which trajectory best describes the probe’s motion? (Hint: Note that the thrust force delivers an upward impulse to the probe during every successive time interval. Consider what happens to the ball in figure C2.4 as it receives analogous continual downward impulses.)
A. A
B. B
C. C
D. D
E. E
In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state n = 2?
A) -1.51 eV B) -6.79 eV C) -3.40 eV D) -4.53 eV E) -5.89 eV
A device that measures absolute air pressure is called a barometer
a. True b. False Indicate whether the statement is true or false