Virtually all the carbon-rich dust in the plane of the galaxy originated in:
A) low-mass stars.
B) high-mass stars.
C) planetary nebulae.
D) white dwarfs.
E) brown dwarfs.
A
You might also like to view...
A tilted top that is spinning clockwise (when viewed from above) experiences a torque that is always horizontal and perpendicular to the top’s angular momentum. If initially the top’s axis of rotation leans somewhat to the viewer’s right and the torque points toward the viewer, how will the top’s axis of rotation precess around the vertical direction?
A. Clockwise (when viewed from above). B. Counter clockwise (when viewed from above). C. Since the torque is horizontal, there is no precession. D. Since the torque is perpendicular to the top’s angular momentum, there is no precession.
Smart Rocks are considered for
A. geologic dating B. ballistic missile defense C. nuclear power D. solar power
The study of compounds that contain carbon is called
a. biochemistry. b. inorganic chemistry. c. polymer chemistry. d. organic chemistry. e. physics.
When light passes from a material with a high index of refraction into material with a low index of refraction:
a. none of the light is reflected. b. some light is reflected without a change of phase. c. some light is reflected with a 180° change of phase. d. the light that is not reflected has a 180° change of phase.