The Chandrasekhar limit of stellar mass (below which a star will collapse into a white dwarf) is, if the mass of our Sun is M, about
A)
0.8 M.
B)
1.2 M.
C)
1.4 M.
D)
1.9 M.
E)
2.8 M.
C
You might also like to view...
A magnetar is a type of ____
a. hypernova b. neutron star c. black hole d. jet e. X-ray burster
A jar filled with gas is placed directly in front of a second jar filled with gas. Using a spectroscope to look at one jar through the other you observe dark spectral lines. The jar closest to you contains
A) gas at the same temperature as the other jar. B) the hotter gas. C) gas at very high pressure. D) the cooler gas. E) the exact same gas as the other jar.
If Vega is apparent magnitude zero, and Deneb first magnitude, then
A) Deneb must be a main sequence star, and Vega a giant. B) Vega must be 2.5× hotter than Deneb. C) Deneb is one magnitude brighter than Vega. D) Vega is about 100× brighter than Deneb. E) Vega is 2.5× brighter than Deneb.
Two light sources individually provide intensity Io at a point. If the sources are operated at the same time and are coherent but out of phase 30°, what is the intensity at that point?
A) 3.7 Io B) 2.0 Io C) 3.0 Io D) 2.8 Io E) 1.0 Io