On an H-R diagram, stellar masses
A) can be determined for main-sequence stars but not for other types of stars.
B) are greatest in the lower left and least in the upper right.
C) decrease from upper left to lower right.
D) are impossible to determine.
A
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The reason the rings of Saturn exist is because
A) the ring material lies within the Roche limit of Saturn. B) the gravitational influence of Titan confines them to those orbits. C) the eruptions of Mimas' volcanoes are keeping them supplied with ice. D) there has not been sufficient time for the ring particles to form a moon. E) Saturn's rapid rotation is spinning material away from its equator, out into space.
Imagine that an electron with an initial spin state 
goes into an SGz device and comes out the – channel of that device. The electron’s spin state is now
A. 
B. 
C. 
D. 
E. 
The resultant of a 40-N force at right angles to a 30-N force is
A) 30 N. B) 40 N. C) 50 N. D) greater than 50 N.
Degenerate matter has two peculiar properties that can affect a star. One is that the degenerate gas resists compression, and the other is that the degenerate gas ____
a. is not density dependent b. does depend on temperature c. does not depend on temperature d. is not pressure dependent. e. does depend on the type of nuclei present