A concave mirror has a radius of curvature of 1.0 m. An object is placed 2.0 m in front of the mirror. Determine the location of the image (in cm)
a. 130
b. 83
c. 67
d. 150
e. 200
C
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An electric field perpendicular to a magnetic field is used as a velocity selector for Li+ions, selecting the velocity v1. Next, Li++ions are sent through the same velocity selector, selecting velocity v2. If neither the electric nor magnetic fields have changed between the two processes, how do v1 and v2 compare?
a. 
b. 
c. 
d. 
e. 
A very long straight current-carrying wire produces a magnetic field of 20 mT at a distance d from the wire. To measure a field of 5 mT due to this wire, you would have to go to a distance from the wire of
A) 16d. B) 8d. C) 4d. D) 2d. E) d .
The relative size of the atmosphere layer as compared to the solid part of Earth is most similar to:
A) the peel of an orange as compared to the meat of the orange. B) the rind of a watermelon as compared to the meat of the watermelon. C) the skin of a grape as compared to the meat of the grape. D) the meat of a peach as compared to the pit of the peach. E) the meat of a cherry as compared to the pit of the cherry.
As shown below, a square loop of wire of side a moves through a uniform magnetic field of magnitude B perpendicular to the page at constant velocity 
directed to the right. Judd says that the emf induced in the loop is zero. Roger claims that it has magnitude 
B
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. Which one, if either, is correct, and why?
?
?
?
A.
B.
C.
.D.
.E.