An air-filled 3.0 nF capacitor is charged to 8.0 V. If the plate separation is 100
m what is the energy density in the electric field?
a. 
b. 
c. 
d. 
e. 
d.
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General Questions: If you pound a feather with a hammer, which one feels a greater force?
A. always the feather B. always the hammer C. The size of the force is always exactly the same on both of them. D. If the feather moves, then it felt the greater force. Otherwise the force was the same on both.
A proton is accelerated from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows
A) 1.1 mm B) 1.1 cm C) 11 cm D) 1.1 m E) 11 m
The relationship 
for an elliptical orbit follows from the fact that the satellite’s velocity is perpendicular to its position vector at the two extreme points and also from
A. Conservation of angular momentum. B. Conservation of energy. C. Conservation of momentum. D. Newton’s second law. E. Some other properties of ellipses. F. (The given relationship is false!)
Drought conditions and high temperatures over the Great Plains are most likely caused by a
A) continental tropical air mass. B) continental polar air mass. C) maritime tropical air mass. D) maritime polar air mass.