Which theory best describes today's current thinking about the birth of a solar system?
a. Big Bang theory
b. Solar Nebular theory
c. Condensation theory
d. Theory of Relativity
e. Passing star theory
b
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Mars has a sufficient mass and a low enough temperature that water molecules could exist in its atmosphere as vapor. One reason Mars' atmosphere does not contain a significant amount of water vapor is that
a. Mars formed in a part of the solar nebula that lacked oxygen. b. Mars formed in a part of the solar nebula that lacked hydrogen. c. All of the water vapor was released in the impact that formed Deimos. d. Ultraviolet radiation breaks the water molecule into less massive particles that can escape. e. The water molecule combines readily with chlorine to form hydrochloric acid.
A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?
a. Bx is positive. b. Bz is positive. c. By is negative. d. By is positive. e. Bx is negative.
Given the thickness and chemical composition of Venus's atmosphere, by how much would you expect its average surface temperature to change between day and night?
a. There should be almost no change in temperature. b. by tens of K (like Earth) c. by hundreds of K (like Mercury) d. The answer depends on where Venus is in its orbit around the Sun.
The maximum temperature on the Kelvin scale is called ________.
A. gamma temperature B. absolute energy C. the vapor point D. absolute zero E. There is no maximum temperature on the Kelvin scale.