The discovery of hot Jupiters led scientists to reconsider the nebuar theory. Which of the following best explains why the nebular theory(as it stood before the discoveries of extrasolar planets) had not predicted the existence of hot Jupiters?
What will be an ideal response?
There are no hot Jupiters in our solar system.
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The formation of more protons than neutrons (at about a 7:1. ratio) was favored in the early universe because
A) it takes more energy to create a neutron from a proton than a proton from a neutron. B) it takes more energy to create a proton from a neutron than a neutron from a proton. C) the more massive neutrons made better targets for nucleon collisions. D) the positively charged protons were repelled away from the explosion.
Astronauts in orbit are weightless or nearly weightless. explain your answer.
What will be an ideal response?
Breaks in the geologic record that result from
locally unrecorded intervals of depositing in sedimentary layers are called a)anticlines. b)intrusive sills. c)unconformities. d)warped or folded time.
For the x-ray diffraction pattern in Figure 15.4 produced with copper K? of wavelength 0.1541 nm, assume that this is some unknown material, but it has been determined that the material is cubic by Laue diffraction.
(a) Prove that the material is BCC. (b) Determine h, k, and l for each of the lines, but you can ignore the small peak at 35°. This is a K? peak. (c) Determine the lattice parameter of this material using the (321) peak.