They usually work by some effort you use to pull things
Plastic can be a lot of things, some will work well as insulation, some won't.
Things that need a battery in order to work, must need Direct Current at some point, if not all, for it to work. eg a hand torch.
Technical litteracy is knowledge of technologies and technical things. How and why things work as they do.
They help us by doing things that we can't do and make easier the things that we can do.
bh
aeronautical enginers
they use it so that they can get the image of it
They inspect and test malfunctioning or related equipment
Some. Some work for other things outside the workplace.
management , computer science & engineering, electronics/communications/chemical enginers
maths
i make about $66,780 a year, but idk 'bout experienced ones.
They usually work by some effort you use to pull things
it works for some things
work hard
we work