Frame
They are convex, or rounded outward. The title is given from where you view through them - from convex to concave. The image is in focus from this direction
Pierce nez is the name given to those types of glasses.
Plastic is an insulator for normal potential differences. The same plastic may start conducting if the volt given to it is very high of the order of megavolt. While conduction plastic will be broken.
The name normally given is the front elevation.
The spectacles that Mrs. Whatsit gave to Meg were missing the lenses. This absence of lenses symbolizes Meg's initial inability to see beyond her immediate circumstances and her struggles with self-doubt. The lack of lenses also represents the idea that true vision and understanding come from within and are not solely based on external perceptions.
The fully plastic moment of section is referred as the moment at which a given cross-section has reached its yield stress.
According to the website www.phenolicpcc.com/phenolic.html‎ it can. No details given.
Grammar is the structure of any given language.
Nobel prize
Yes iron is very much heavier then plastic.
Displays
when two or more ideas are given equal weight and grammatical structure in a sentence APEX :)