Mass is transferred from a normal star in a close binary system toward a white dwarf. The material that is transferred to the white dwarf forms a rapidly growing whirlpool of material known around the white dwarf known as a(n)
a. accretion disk.
b. Lagrangian point.
c. Algol paradox.
d. planetary nebula.
e. supernova remnant.
Question 2That the radio lobes radiate synchrotron radiation indicates that
a. high-speed electrons are spiraling through a magnetic field.
b. the source of the radio jets must be a black hole.
c. the source of the radio energy is rotating rapidly.
d. the central galaxy must be a giant elliptical galaxy.
e. the central galaxy must rotate about two nearly perpendicular axes.
Question 3In the orbital plane of a binary star system matter can be transferred from one star to the other through the ___________, located directly between the two stars is the point where the Roche lobes meet.
a. turnoff points
b. horizontal branch
c. Lagrangian points
d. synchrotron points
e. radiation belts
Question 4The fact that many radio lobes emit more intensely from the side away from the galaxy suggests that
a. they are formed by material falling into the galaxy.
b. they are powered by magnetic fields.
c. they are excited by radiation from nearby galaxies.
d. they are powered by the rapid rotation of the galaxy.
e. they are created by jets from the galaxy emitting where the material is halted.
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