Download Quiz CH 9 solution a. Red giant b. White Dwarf

Quiz CH 9 solution
1. From the diagram, a very bright and cool star would be
a. Red giant
b. White Dwarf
c. Main sequence
2. In a binary system, the more massive star (everyone gets credit for this because choices c & d
were all on one line, which was confusing)
a. is at the center of mass.
b. is farthest from the center of mass.
c. is nearest the center of mass.
d. follows the largest orbit.
e. shows a larger Doppler shift in its spectral lines
3. From the mass-luminosity relation, a
2 solar mass star on the main
sequence would have a luminosity of
approximately ____ solar
luminosities.
a. 2
b. 4
c. 11
d. 0.5
e. 0.25
The best answer is 11, but I’ll give
credit for 2 and 4 also
4. The absolute magnitude of a star is
the apparent magnitude it would
have if it were 10 pc from Earth.
T F
5. The ____ of a star is a measure of the
total energy radiated by the star in
one second.
a. Color
b. Spectral type
b. apparent visual magnitude
c. luminosity