Absorption lines are produced by ____
a. atoms that become ionized
b. electrons that transfer from a high energy level to a low energy level
c. electrons that transfer from a low energy level to a high energy level
d. the intensity of agitation of atoms in a hot gas
e. the motion of an object toward or away from the observer
c
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The log of the fatigue-crack propagation rate for most materials is linearly related to the log of the stress _________range to a power.
Fill in the blank(s) with the appropriate word(s).
The quark flavors are
A. up, down. B. red, green. C. muon, pion. D. cyan, magenta. E. lepton, gluon.
What is pseudoscience?
What will be an ideal response?
Imagine that you feed alternating current to an inductor with high inductance and very low resistance. Suppose we slowly increase the frequency of this alternating current while keeping the amplitude ?0 of the applied emf constant. How does the amplitude i0 of the alternating current flowing in the coil change (or does it)?
A. 25,000 B. 4000 C. 2500 D. 40 E. 25 F. Some other result (specify). T. One needs more information to answer.