In what sense are galaxies cosmic recycling plants?
In what sense are galaxies cosmic recycling plants?
C) New stars in galaxies form from gas that has been ejected by previous generations of stars.
You might also like to view...
If the wavelength of light in Young's two-slit experiment is decreased, which one of the following statements is true of the interference pattern?
A) The distance between the minima stays the same. B) The distance between the maxima decreases. C) The distance between maxima stays the same. D) The distance between the maxima increases. E) Impossible to tell without knowing the separation between the slits.
What was most surprising about SN1987A?
A) Its pulsar appeared within weeks of the explosion. B) The supernova was luminous enough to see with the naked eye. C) The supernova was not even in our own Galaxy. D) The parent star was a blue supergiant, much like Deneb or Rigel. E) It did not produce the flood of neutrinos our models had led us to expect.
Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the rock tends at first to
A) continue in a circular path. B) follow a straight-line path. C) spiral inward. D) fall straight downward.
Charge A has 10 electric field lines coming out, Charge B has 20 lines coming out, and Charge C has 30 lines coming in. Which pair of these charges will have the largest force between them if placed one cm apart?
a. A and B b. B and C c. C and A d. More information is needed.