Pulsars
A) spin very rapidly when they're young.
B) are the cause of gamma-ray bursts.
C) spin very slowly when they're young, and gradually spin faster as they age.
D) generally form from 25 solar mass stars.
E) emit radio in all directions.
A
You might also like to view...
Elementary particles that experience the weak nuclear force but not the strong force are called
A) leptons. B) hadrons. C) mesons. D) bosons. E) baryons.
A ferromagnetic material is magnetized by the alignment of
a. domains. b. atoms. c. single magnetic dipoles. d. poles.
The observation that outer parts of galaxies rotate faster than the observable mass within their orbit can pull them implies that ________.
A. in time, galaxies will develop spiral arms B. the masses of galaxies are larger than their luminous mass C. all galaxies will eventually develop a bulge D. galaxies are unstable E. None of these choices is correct.
Match the words in the left-hand column to the appropriate blank in the sentences in the right-hand column. Use each word only once.