Shield volcanoes are composed of
A) andesitic magma.
B) basaltic magma.
C) granitic magma.
D) silica-rich magma.
Answer: B
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In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by
a. a globular cluster. b. a planetary nebulae. c. a white dwarf. d. a young massive star. e. a supernova remnant.
Much of the solar wind comes from ________ where the magnetic field does not loop back into the Sun
a. prominences b. coronal holes c. spicules d. granulation e. auroras
A series RLC circuit has a 100-? resistor, 2.00-mH inductor and a 4.00-?F capacitor connected across a 120-V rms ac source at (1000/?) Hz. What is the power dissipated by the circuit?
A) 184 W B) 18.6 W C) 58.4 W D) 91.8 W E) 180 W
Consider the two situations shown in the figure below, in which there is no acceleration. In both cases the men pull with a force of magnitude F. How does the reading on the scale in part (i) of the figure relate to the reading on the scale in part (ii)?