The lobes of a radio galaxy can be as much as
A) dozens of light-years from the galaxy's nucleus.
B) hundreds of light-years from the galaxy's nucleus.
C) thousands of light-years from the galaxy's nucleus.
D) millions of light-years from the galaxy's nucleus.
E) billions of light-years from the galaxy's nucleus.
D
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When a comet is within the inner solar system, its visible tails point
A) away from the Sun B) opposite the direction the comet is moving in its orbit C) perpendicular to the ecliptic plane D) always almost due north E) in the direction the comet is moving in its orbit
A magnetic field is generated by a current-carrying wire. Which one of the following statements concerning this situation is false?
a) The magnitude of this magnetic field decreases with increasing distance away from the wire. b) A right-hand rule is useful for determining the direction of the magnetic field at a particular location. c) The magnitude of the magnetic field is directly proportional to the magnitude of the current. d) The magnetic field is parallel to the direction of the current in the wire.
Pluto is most like a
A) terrestrial planet. B) jovian (gas giant) planet. C) comet. D) star.
What are the three main types of hearing loss?