Describe why having firmly held electrons in their electron shell makes a material a good insulator.
What will be an ideal response?
A characteristic of insulating materials is that their electrons are firmly held in the electron shells of each atom of the material. A great deal of force is required to remove these electrons. Insulating materials have few free electrons in their structure.
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Express 2.3 square centimeters as square millimeters.
A. 23 B. 230 C. 2,300 D. 23,000
Low density vapors entering the compressor will mean low refrigerant flow through the compressor.
Answer the following statement true (T) or false (F)
How do columns normally fail?
A. collapsing B. buckling C. bending D. crushing
Assume you are working for a custom extrusion company that uses many dies, many resins, and many colors. To keep costs down, your company generally buys natural (uncolored) resin. You must buy a new extruder and have two choices, one with L/D of 20 and one with L/D of 30 . Which machine would you buy? Why? Give two disadvantages of the machine you chose
What will be an ideal response?