Discuss the role of styrene in the crosslinking of unsaturated polyesters
What will be an ideal response?
Styrene is both a solvent and a participating component in the crosslinking. As a solvent it assists in facilitating the reaction by adding mobility to the polymers. As a participating component in the crosslinking it bridges between polyester molecules making the crosslinks easier to form.
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If a wire repair, such as repairs made under the hood or under the vehicle is exposed to the elements, which type repair should be used?
A) Wire nuts and electrical tape B) Solder and adhesive-lined heat shrink or crimp and seal connectors C) Rosin-core solder and electrical tape D) Butt connectors
The subsequent problems deal with the circuit below
D =
A. B - C
B. 
C. 
D. 
E. 
Modulo-K counter. Consider the following worksheet that forms a modulo-K counter with the K value specified in A5. The clear value in E4 equals 1 when the counter Q values are equal to the K value in A5. The VBA Macro Input_Counter assigned to the arrow increments the input count in A2 and clears the input count when Clear equals 1.
a. What is the Excel formula in C2?
b. What is the Excel formula in D2?
c. What is the Excel formula in E2?
d. What is the Excel formula in F2?
e. What is the Excel formula in E4?
f. Compose the VBA Macro Input_Counter.
Domestic uses account for about ____ percent of U.S. water use
A) 45 B) 13 C) 42 D) 24