The solubility parameter of polycarbonate is 20.3 (MPa)0.5 and for carbon disulfide it is 20.4 (MPa)0.5. Should carbon disulfide dissolve polycarbonate? _____________
Fill in the blank(s) with the appropriate word(s).
Yes
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If one metal has double the number of conduction electrons per unit volume of a second metal, then its Fermi level is how many times that of the second metal?
A) 1.41 B) 2.83 C) 2.00 D) 3.22 E) 1.59
Energy in the Electric Field: A uniform electric field has the strength of 7.0 N/C. What is the electric energy density of this field? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 2.2 × 10-10 J/m3 B. 3.1 × 10-11 J/m3 C. 2.8 × 1012 J/m3 D. 5.5 × 1012 J/m3
Sometimes a flashlight filament glows red instead of white, which indicates a lowness of
A) current in the filament. B) filament temperature. C) both of these D) neither of these
The number of electrons delivered daily by power utilities to an average American home during a typical week is
A) zero. B) 110. C) 220. D) billions of billions. E) none of the above