The event horizon of a black hole is the point where _____.
A) the mass of the black hole is concentrated in a singularity
B) the accretion disk around the black hole contacts its surface
C) the escape velocity equals the speed of light
D) tidal forces ionize infalling gas
E) an infalling particle reaches equilibrium with radiation pressure
Correct Answer:
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Q27: Supernova remnants _.
A) always contain pulsars, because
Q28: Pulsars were discovered because they _.
A) provide
Q29: If the Sun was replaced by a
Q30: Matter falling onto a compact object, such
Q31: An X-ray burster occurs in a pulsar
Q33: The jets emitted by compact objects are
Q34: The first confirmed black hole, Cygnus X-1,
Q35: Millisecond pulsars _.
A) are created in supernova
Q36: Pulsar planets are _.
A) huge gas planets
Q37: Astronauts approaching a black hole would observe
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