Which statement about gamma ray bursters is NOT correct?
A) Millisecond flickering implies they are tiny in size.
B) In seconds, they radiate enormous amounts of energy.
C) They seem to be coming from far beyond our own Milky Way.
D) They are scaled up X-ray bursters, with more massive objects involved.
E) The beams may be bipolar ejections from the hypernova formation of black holes.
D
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Which of the following best describes the image of a concave mirror when the object is at a distance greater than twice the focal point distance from the mirror?
a. virtual, upright and magnification greater than one b. real, inverted and magnification less than one c. virtual, upright and magnification less than one d. real, inverted and magnification greater than one