The event horizon
a. is believed to be a singularity.
b. is a crystalline layer.
c. has a radius equal to the Schwarzschild radius.
d. marks the inner boundary of a planetary nebula.
e. is located at the point where synchrotron radiation is created around a pulsar.
c
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Which of the following particles does not mediate the weak interaction?
A. W+
B. W-
C. 
D. Z0
E. All of these choices mediate this interaction.
Consider a plot of the displacement (x) as a function of the applied force (F) for an ideal elastic spring. The slope of the curve would be
A) the acceleration due to gravity. B) the spring constant. C) the reciprocal of the acceleration of gravity. D) the mass of the object attached to the spring. E) the reciprocal of the spring constant.
The resistivity of a 1.0 m long wire is 1.72 × 10-8 ?m and its cross sectional area is 2.0 × 10-6 m2. If the wire carries a current of 0.20 A, what is the voltage across the wire?
A) 17 mV B) 0.90 mV C) 1.7 mV D) 10 mV E) 90 mV
Technology is mainly
A) a body of scientific knowledge. B) a tool of science. C) what is wrong with the world. D) a solution to all of mankind's problems.