That brighter Sirius A weighs 3 solar masses, but the white dwarf Sirius B is only about one solar mass implies:
A) that white dwarfs evolve slower than main sequence stars.
B) that the collapsed companion transferred mass to Sirius A.
C) that there should be a planetary nebula around the Sirius system.
D) that Sirius A will be stable three times longer than Sirius B.
E) the Sirius A will end up as a black hole, not a white dwarf like its companion.
B
You might also like to view...
Air expands adiabatically (no heat in, no heat out) from T = 300 K and P = 100 atm to a final pressure of 1 atm. Treat the gas as ideal with g = 1.4, and determine the final temperature. Compare your result to the boiling points of nitrogen (77.4 K) and oxygen (90.2 K). Could this method result in the liquification of air?
Mass on a Spring: A block attached to an ideal spring of force constant (spring constant) 15 N/m executes simple harmonic motion on a frictionless horizontal surface. At time t = 0 s, the block has a displacement of -0.90 m, a velocity of -0.80 m/s, and an acceleration of +2.9 m/s2. The mass of the block is closest to
A. 2.3 kg B. 2.6 kg C. 4.7 kg D. 9.4 kg
An object weighs 432 N on the surface of the earth. The earth has radius R. If the object is raised to a height of 3R above the earth's surface, what is its weight?
A) 108 N B) 48.0 N C) 27.0 N D) 305 N E) 144 N
All three circuits shown below have R = 100 ?, L = 0.1 H and emf ? = (5.0 V) sin (377 t). Which statement regarding the angular resonance frequencies ?A, ?B, and ?C is correct?
?
?
a.
?C > ?A = ?B
b.
?C < ?A = ?B
c.
?A = ?B = ?C
d.
?B < ?A = ?C
e.
?B > ?A = ?C