The superposition of two waves, 
and 
,results in a wave with a wavelength of
A.
m.B.
C.
D.
E.
Answer: D
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A heavy ball hangs by a string, with a second string attached to its bottom (Figure 1.7 in your text). A quick pull on the bottom string breaks the
A) top string. B) bottom string. C) top or bottom string equally likely. D) none of the above
The L absorption edge corresponds to the excitation of an electron out of an atomic orbital with the principal quantum number of _________.
Fill in the blank(s) with the appropriate word(s).
Which terrestrial planet has the most moons?
A. Earth B. Mars C. Mercury D. Venus
What is the purpose of adding aluminum salts and a base to water during water treatment?
A) The two together gel and trap dirt and bacteria. B) The higher pH kills bacteria. C) The aluminum removes the rust taste from the water. D) The base dissolves the dirt. E) It improves the taste.