According to Mathiessen’s rule, the electrical resistivity of a metal is the _________of electrical resistivity of 0, 1, 2, and 3-dimensional defects and thermal vibrations.
Fill in the blank(s) with the appropriate word(s).
sum
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Cepheid variables are useful in measuring the distance to ____
a. globular clusters and dwarf galaxies around the Milky way, but nothing farther b. globular clusters and the Andromeda Galaxy, but not more distant objects c. galaxies that are within 30 megaparsecs, a relatively short distance d. galaxies that are moderately far away, up to about 500 megaparsecs e. galaxies and galactic clusters within a gigaparsec of the Milky Way
All planets revolve around the Sun counterclockwise, and most also rotate on their axis counterclockwise
Indicate whether the statement is true or false
Newton's second law states: sum of forces = mass × acceleration. According to this, what property can you determine if you observe the acceleration of an object with a known mass?
A) the value of a single force acting on the object B) the current location of the object C) the current velocity of the object. D) the sum total of all forces acting on the object
Based on all we know about the terrestrial worlds, what single factor appears to play the most important role in a terrestrial planet's geological destiny?
A) whether or not it has liquid water B) its composition C) its size D) its distance from the Sun