Star A and Star B have the same size, but Star A is more luminous than Star B. Based on this information, which of the following must be the case?
A. Star A is more massive than Star B.
B. Star A and Star B have same temperature.
C. Star A is hotter than Star B.
D. Star A is cooler than Star B.
Answer: C
You might also like to view...
Energy lost by an isolated pulsar is carried away by a _____________
Fill in the blank(s) with correct word
What is happening when two plates are smashing into one another?
A. Precession causes mountains to be built up; earthquakes and volcanoes may also occur. B. Subduction causes mountains to be built up; earthquakes and volcanoes may also occur. C. Rifting causes mountains to be built up; earthquakes and volcanoes may also occur. D. nothing
Why do rich clusters of galaxies contain a larger fraction of ellipticals than normal?
What will be an ideal response?
The electric potential at the surface of a charged conductor
a. is always zero. b. is always independent of the magnitude of the charge on the surface. c. may be set equal to zero by adding an appropriate constant to the potential at all points of space. d. is always such that the potential is zero at all points inside the conductor. e. is always such that the potential is always zero within a hollow space inside the conductor.