What makes Polaris a special star?
a. It is the brightest star in the sky.
b. It is always directly overhead, no matter where you are.
c. It is very close to the north celestial pole on the celestial sphere.
d. Its azimuth (direction) is always due north.
Ans: c. It is very close to the north celestial pole on the celestial sphere.
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If R = 4.0 k?, C = 3.0 mF, ? = 15 V, Q = 12 mC, and I = 2.0 mA, what is the potential difference Vb ? Va?
a.
+3.0 V
b.
?19 V
c.
?3.0 V
d.
+27 V
e.
+21 V
An electron is moving at 
m/s at an angle of 40 
to a 0.80 T magnetic field. What is the magnitude of the force on the electron?
A. 
B. 
C. 
D. 
E. 
What is the Q of the reaction 
The rest mass of the proton is 938 MeV/c2 and of the neutral point is 135 MeV/c2
A. 187 MeV B. 135 MeV C. 938 MeV D. -187 MeV E. -135 MeV
The absolute temperature of a monatomic ideal gas is directly proportional to which of the following properties, when taken as an average, of the molecules of that gas?
a. speed c. mass b. momentum d. kinetic energy