Describe the key features of a polymer that would make it electrically conductive
What will be an ideal response?
Electrical conductivity results from the ability of electrons to move freely within the material's structure. This can occur in polymers when the electrons are delocalized. One method to achieve delocalization is when the bonds in the polymer are conjugated double bonds. Another method to achieve conductivity is to add a conductive filler to the plastic material.
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Compute the surface area of a sphere with a 2.120-meter diameter rounded to 4 significant digits.
Fill in the blank(s) with the appropriate word(s).
When dealing with construction joints, care must be taken to ensure _____
a. they are not too close together b. a good bond between layers c. reinforcement is properly installed d. mating surfaces are smooth
Which of the following statements is NOT true?
A. Voltage and volts are used to define an amount of electrical potential. B. Voltage drop is the amount of voltage that is being used by a component, wire, or a connection. C. Amperage is the amount of electrical current flow. D. Direct current flows only from zero to negative.
Two common configurations of gauge manifolds are the two-valve manifold and the four-valve manifold. The valves are __________ when turned counter-clockwise and __________ when turned clockwise.
A. closed, open B. open, closed