What makes the Crab Nebula pulsar unusual among other pulsars? ...

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What makes the Crab Nebula pulsar unusual among other pulsars?
 
  A) It is a magnetar, with far more intense magnetic fields than any other.
  B) It is the oldest known pulsar.
  C) Its period is much less regular than other pulsars.
  D) It is the fastest spinning known pulsar.
  E) It is relatively bright in shorter wavelengths, like visible and X-rays.

Question 2

The sketch above shows groups of stars on the H-R diagram, labeled (a) through (e); note that (a) represents the entire main sequence while (c) and (d) represent only small parts of the main sequence.
 
  Which group represents stars that are extremely bright and emit most of their radiation as ultraviolet light?
  A) a B) b C) c D) d E) e

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Answer to Question 1

E

Answer to Question 2

C

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