How fast are Earth's plates moving due to tectonic motion?
A. a few centimeters per year
B. a few centimeters per century
C. a meters per year
D. a few kilometers per year
Answer: A
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The centroid of the parallelogram shown in the figure below is at coordinates (x, y):
(A) 5b/6, h/2
(B) 5b/12, h/3
(C) 5b/8, h/2
(D) 5b/6, h/3
An ideal monatomic gas undergoes a reversible expansion to 1.5 times its original volume. In which of these processes does the gas have the largest loss of internal energy?
A) at constant pressure B) if the pressure increases in proportion to the volume C) if the pressure decreases in proportion to the volume D) at constant temperature E) adiabatically
The mass of an electron and its antiparticle, a positron, is 0.511 MeV/c2 . In order to produce an electron-positron pair, a gamma ray must have an energy larger than 1.022 MeV because __________
Fill in the blank(s) with correct word
Mica is not found in
A) slate. B) schist. C) gneiss. D) quartzite.