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

Physics & Space Science

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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

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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

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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

Physics & Space Science

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

Physics & Space Science