The atmosphere on Mercury is due to
A) volcanic outgassing.
B) evaporation.
C) sublimation.
D) bombardment.
E) There is no detectable atmosphere on Mercury.
D
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Thin Lenses: How far from a converging lens of focal length 30 cm must an object be placed so the image will be virtual and 3.0 times as large as the object?
Fill in the blank(s) with the appropriate word(s).
Parallel-Plate Capacitor: An ideal parallel-plate capacitor having circular plates of diameter D that are a distance d apart stores energy U when it is connected across a fixed potential difference. If you want to triple the amount of energy stored in this capacitor by changing only the size of its plates, the diameter should be changed to
A. 9D.
B. 3D.
C. D
D. 
E. 
The rear-view mirrors on the passenger side of many new cars have a warning written on them: "OBJECTS IN MIRROR ARE CLOSER THAN THEY APPEAR." This implies that the mirror must be
A) concave. B) plane. C) convex. D) transparent.
Monochromatic light (l = 500 nm) is incident on a soap bubble (n = 1.40). How thick is the bubble (in nm) if destructive interference occurs in the reflected light?
a. 102 b. 179 c. 54 d. 1 e. 89