Electrons orbiting the nucleus of an atom are grouped into energy bands known as
a. tracks.
b. slots.
c. shells.
d. tunnels.
Ans: c. shells.
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What is the average value of the magnitude of the Poynting vector 
at 1 meter from a 100-watt lightbulb radiating in all directions?
A. 1 W/m2 B. 4 W/m2 C. 2 W/m2 D. 8 W/m2 E. 12 W/m2
A block is pushed up a frictionless 30° incline by an applied force as shown. If F = 25 N and M = 3.0 kg, what is the magnitude of the resulting acceleration of the block?
A. 2.3 m/s2 B. 4.6 m/s2 C. 3.5 m/s2 D. 2.9 m/s2 E. 5.1 m/s2
Another name for the leeward slope is
A) upslope. B) downslope. C) rain shadow. D) downslope and/or rain shadow.
Theoretical physicists have had the least success in combining which force with the electromagnetic force?
a. strong nuclear force b. weak nuclear force c. gravitational force d. electrical Coulomb force