The amount of solar energy per square meter atop the atmosphere at right angles to the Sun's rays is about
A) 700 joules.
B) 1000 joules.
C) 1400 joules.
D) much more than 1400 joules.
Answer: C
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Solid solution strengthening is _________with designs that require the part to be heated during fabrication by processes such as welding or hot working.
Fill in the blank(s) with the appropriate word(s).
When looking for the radial velocity changes or "wobbles" detected due to Doppler shifts, which mass combination is most likely to be detected?
A) high mass star, high mass planet B) high mass star, low mass planet C) low mass star, high mass planet D) low mass star, low mass planet E) a high mass planet; the mass of the star is irrelevant
Which is NOT a characteristic of an ideal gas?
a. Its properties and behavior are identical to those of air at atmospheric pressure. b. Its particles have no internal structure. c. Its particles are indestructible. d. Its particles only interact with each other when they collide. e. It consists of an enormous number of tiny particles separated by large distances.
What evidence is there to prove that there has been no tectonic movement on Mars?
a. The meteorites that have landed on Earth b. The "blueberries" found by rover Opportunity c. The huge size of the Martian volcanoes d. The presence of ice beneath the surface e. The large number of polygonal cracks on the surface