Which of the following is not a planar defect?
(a) Edge dislocation
(b) Stacking fault
(c) Twin
(d) Grain boundary
(a) Edge dislocation
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Uranus and Neptune have methane clouds but Jupiter and Saturn do not. Which factor explains why?
A) Temperatures on Jupiter and Saturn are too high for methane to condense. B) Jupiter and Saturn do not contain any methane gas. C) The rapid rotation of Jupiter and Saturn prevents methane clouds from forming. D) The stronger gravity on Jupiter and Saturn pulls methane downward so that it can't form clouds.
What particle is emitted when 20Na decays to 20Ne? (atomic numbers of Na and Ne are, respectively, 11 and 10)
a. alpha b. beta (electron) c. beta (positron) d. gamma quantum
Almost all active galactic nuclei seem to be involved in ________ with neighbors
Fill in the blank(s) with correct word
What does it mean to say that electrons are not point particles, but rather wavelike?
What will be an ideal response?