Which of the following is a cloud of vertical development?
A. cirrus
B. cumulonimbus
C. nimbostratus
D. stratocumulus
Answer: B. cumulonimbus
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In hot-work, a metal is deformed at temperatures that are either above the ___________temperature, or above 50 % of the absolute melting temperature.
Fill in the blank(s) with the appropriate word(s).
Results from the Phoenix lander and Curiosity rover suggest that the positive result from the Viking Labeled Release experiment was probably due to
A) the destruction of organic molecules by oxygen released when perchlorates in the soil decomposed on heating B) terrestrial contamination from the robotic arm which took the samples C) a malfunction in the experiment D) high levels of radioactivity in the soil
While none yet exist, in the very distant future, black dwarfs will comprise the majority of the "normal matter" of the universe
Indicate whether the statement is true or false
In a completely inelastic collision between two objects where the mass of one is double that of the other, which of the following statements is always true?
a. The larger mass will always lose kinetic energy. b. The smaller mass will always gain kinetic energy. c. The momentum of the smaller mass will have a larger magnitude change than that of the larger mass. d. Not even one of the above statements is true.