A billiard ball traveling at 3.00 m/s collides perfectly elastically with an identical billiard ball initially at rest on the level table. The initially moving billiard ball deflects 30.0° from its original direction
What is the speed of the initially stationary billiard ball after the collision? A) 2.00 m/s
B) 0.866 m/s
C) 1.50 m/s
D) 2.59 m/s
E) 0.750 m/s
C
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In order to turn a star's proper motion into its space velocity, we must also know:
A) its mass and spectral type. B) its temperature and age. C) its distance and radial velocity. D) its distance and mass. E) its spectral type and period of rotation.
A resistor and an inductor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the resistor is
A) greater than the battery's terminal voltage. B) equal to the battery's terminal voltage. C) less than the battery's terminal voltage, but not zero. D) zero. E) equal to the voltage across the inductor.
What is the inductive reactance of a 200 mH inductor attached to a 120 V rms 60.0 Hz source?
A. 12.0 
B. 75.4
C. 188 
D. 940
E. 24.0
The Schwarzschild radius of a black hole depends on ________
A) the way in which the black hole formed B) both the mass and chemical composition of the black hole C) only the mass of the black hole D) the observationally measured radius of the black hole