Why are Saturn's rings so thin?
A) They are attached to Saturn's very thin equator.
B) The "gap" moons shepherd the particles and maintain its thin profile.
C) Any particle in the ring with an orbital tilt would collide with other ring particles.
D) Solar radiation pressure keeps particles pressed into the rings.
E) They formed from a flat sheet of material that broke apart.
C) Any particle in the ring with an orbital tilt would collide with other ring particles.
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Consider a set of electrons with an initial spin state 
If we send these electrons into an SGx device, what is the probability that a given electron will be determined to have its spin anti aligned with the +x direction?
A. 0
B. 1/4
C. 1/2
D. 
E. 1
A 4.0-?F capacitor is charged to 6.0-V. It is then connected in series with a 3.0-M? resistor and connected to a 12-V battery. How long after being connected to the battery will the voltage across the capacitor be 9.0 V?
A) 5.5 s B) 7.2 s C) 8.3 s D) 12 s E) 17 s
Between now and 2024, in which year will there be no opportunities for a solar eclipse?
a. 2015 b. 2016 c. 2018 d. 2021 e. 2024
Specific Heat: Object 1 has three times the specific heat capacity and four times the mass of Object 2. The two objects are heated from the same initial temperature, T0, to the same final temperature Tf. During this process, if Object 1 absorbs heat Q, the amount of heat absorbed by Object 2 will be
A. 12Q.
B. 6Q.
C. 
Q.
D. 
Q.
E. 
Q.