A radio galaxy whose lobes are swept back as if forming a tail. This probably indicates that:
A) this is evidence for intergalactic matter.
B) the galaxy is about to evolve into a spiral.
C) the galaxy is isolated, not part of a cluster.
D) the galaxy is moving towards Earth.
E) there must be another galaxy nearby.
A
You might also like to view...
A ____ has a few million light sensitive diodes in an array typically about a half-inch square
a. photometer b. charge-coupled device c. spectrograph d. photographic plate e. grating
A double-slit interference experiment is performed in the air. Later, the same apparatus is immersed in benzene (index of refraction, n = 1.50), and the experiment is repeated
When the apparatus is in benzene, you observe the interference fringes to be A) more closely spaced as when the apparatus is in air. B) equally spaced as when the apparatus is in air. C) more widely spaced as when the apparatus is in air. D) Impossible to tell without knowing the wavelength of light in use. E) Impossible to tell without knowing the separation between the slits.
If R = 4.0 k?, C = 3.0 mF, ? = 15 V, Q = 12 mC, and I = 2.0 mA, what is the potential difference Vb ? Va?
a.
+3.0 V
b.
?19 V
c.
?3.0 V
d.
+27 V
e.
+21 V
The fourth harmonic of a complex tone has a frequency of 600 Hz. What is the frequency of the tone?