An initially uncharged 10-?F capacitor is charged by a 10-V battery through a resistance R. The capacitor reaches a potential difference of 4 V in a period of 3 s after the charging began. Find the value of R
587 k?
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A 4.00 kg mass is located at (2.00 m, 2.00 m, 0.00 m) and a 3.00 kg mass is located at (–1.0 m, 3.00 m, 0.00 m). If this system of masses rotated about the X-axis perpendicular to the Z-Y plane, then the moment of inertia of this system is
A. 24 kg 
B. 36 kg
C. 43 kg
D. 56 kg
E. 62 kg
As soon as a ball rolls off the edge of a table
A) it is not acted on by any forces. B) it is not acted on by any horizontal forces. C) has a zero net force acting on it. D) none of the above
What mechanism is most responsible for generating the internal heat of Io that drives the volcanic activity?
A) accretion B) radioactive decay C) differentiation D) tidal heating E) bombardment
The event horizon of a black hole is
A) the surface below which no matter or energy can escape. B) the surface where light becomes trapped in a circular orbit around the black hole. C) the physical surface of the black hole. D) the point in time when a black hole comes into being.