Of the following parts of the Sun, which is the hottest?
a. chromosphere
b. supergranules
c. photosphere
d. corona
e. sunspots
d
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The lowest frequency visible light is
a. violet b. red c. blue d. green e. yellow
All of the following criteria define a mineral except:
-It is organic. -It is naturally occurring. -It has a well-defined chemical composition. -It is inorganic. -It has an orderly internal structure.
A closed loop conductor that forms a circle with a radius of is located in a uniform but changing magnetic field
If the maximum emf induced in the loop is what is the maximum rate at which the magnetic field strength is changing if the magnetic field is oriented perpendicular to the plane in which the loop lies? A) 0.40 T/s B) 2.5 T/s C) 0.080 T/s D) 5.0 T/s
Suppose the distance to a star was doubled but everything else about the star stayed the same. What would happen to the star's luminosity and apparent brightness?
A) Luminosity is decreased by a factor of four and the apparent brightness is decreased by a factor of four. B) Luminosity is decreased by a factor of two and the apparent brightness is decreased by a factor of two. C) Luminosity remains the same, but the apparent brightness is decreased by a factor of two. D) Luminosity remains the same, but the apparent brightness is decreased by a factor of four. E) Luminosity is decreased by a factor of four, but the apparent brightness remains the same.