An alpha particle (m = 6.7 × 10^?27 kg, q = +3.2 × 10^?19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference VA ? VB
a. +4.2 V
b. ?4.2 V
c. ?9.4 V
d. +9.4 V
e. ?8.4 V
b
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The moment of inertia of a rod being rotated about one end is 1/3 
What is the moment of inertia of a rod of length L and mass M being rotated about a point located 0.300 L?
A. 0.123 
B. 0.198
C. 0.205
D. 0.240
E. 0.300
What do we call the bright, sphere-shaped region of stars that occupies the central few thousand light-years of the Milky Way Galaxy?
A) the galaxy's disk B) the galaxy's bulge C) a globular cluster D) the galaxy's halo
Which of the following combinations of circuit components can be used to make a tuner for a radio, to select the desired frequency?
a. fixed inductor, variable resistor b. fixed resistor, variable inductor c. fixed inductor, variable capacitor d. fixed capacitor, variable resistor
The two principal agents of metamorphism are heat and ______________
Fill in the blank(s) with correct word