Molecules of which monomer could, by themselves, form a condensation polymer?
a. HO–CH2–CH2–NH2
b. H2N–CH2–COOH
c. HO–CH2–CH2–OH
d. HOOC–COOH
b
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A 150 N picture hangs from a nail in the wall. The maximum shear stress the nail can sustain is 2.00 
The smallest diameter the nail can be is
A. 9.77 mm. B. 8.22 mm. C. 7.97 mm. D. 7.52 mm. E. 6.03 mm.
In an interference pattern, the wavelength and frequency are
a. the same in both the regions of constructive interference and the regions of destructive interference. b. greater in regions of constructive interference than in regions of destructive interference. c. smaller in regions of constructive interference than in regions of destructive interference. d. unchanged in regions of destructive interference but greater in regions of constructive interference. e. unchanged in regions of destructive interference but smaller in regions of constructive interference.
Triton, the largest moon of Neptune was probably once
A) a Kuiper Belt Object B) a planet C) an asteroid D) a comet
The force of Earth's gravity on a capsule in space will lessen as it moves farther away. If the capsule moves to twice its distance, the force toward Earth becomes
A) half. B) three-quarters. C) one-fourth. D) none of the above