A standard exam page is 8.5 inches by 11 inches. An exam that is 2.0 mm thick has a volume of
a. 1.9 × 10^4 mm3.
b. 4.7 × 10^4 mm3.
c. 1.2 × 10^5 mm3.
d. 3.1 × 10^5 mm3.
e. 3.1 × 10^3 mm3.
c
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Which of the following is not a form of copolymer?
(a) Uniform (b) Random (c) Block (d) Graft
A slab of material has area A, thickness L, and thermal conductivity k. One of its surfaces (P) is maintained at temperature T1 and the other surface (Q) is maintained at a lower temperature T2. The rate of heat flow by conduction from P to Q is:
A. kA(T1 ? T2)/L2 B. kL(T1 ? T2)/A C. kA(T1 ? T2)/L D. k(T1 ? T2)/(LA) E. LA(T1 ? T2)/k
A 40 watt fluorescent bulb is rated for use in a 120 volt line. During a brownout the actual voltage drops to 102 V. The actual power dissipated in the bulb under these conditions is
A. 30.0 W. B. 47.1 W. C. 28.9 W. D. 0.283 W.
In the context of helium fusion, if the core of a post-main-sequence star has no nuclear reactions, the star is a__________
A) red giant B) green giant C) gray giant D) yellow giant