electronic crap that only works for one semester

yeah....they often have candy (ore ice cream) so pretty good yield.....and its free when you steal it, so also really economical

they also may want local teachers because the language in SA varies hugely from place to place, and there arent a ton of people outside that speak (for example) Afrikaans

So make a friend (or even more).....and do the problems in their book on the assigned pages......

I know friends are scary.....but thats part of the college experience.

Sometimes its just that wording one certain questions was unclear such that lots of students misunderstood the question, or new information or a better way of explaining a section (or realizing a section was being glossed over too quickly) is often the motivation. Education, like science, is not static, and sometimes one idea of how to present a concept seems really good if you are a professor who understands it, but lacking for someone who has no clue whats going on.

Note: My experience is from a chemist whose PI wrote an intro chem book for college, might not be the same in other fields.

every other post is about apple, AND every other post is about facebook.

its 50-50 since 3D printing and bitcoin became old hat.

this

are you trying to convince us, or yourself, that it was a good idea for you to not join.

citation needed

only if its 2-ply

Thats not true at all. When plants die, fungus and microbes eat them up, and re-release the CO2. In the normal course of events (non-human = "normal") there is a continuous flow to and from plants. Plants breath the CO2, make themselves grow, and eventually they are re-converted to CO2 through natural processes.

If instead when they die (at your hand or otherwise) you convert them to a block of Carbon then that CO2 is removed from the cycle.

Its true, not all carbon in the carbon cycle is in the atmosphere. A lot is trapped in plants and animals, but these are "short-term" not geological scale storage. Carbon neutral/positive/negative is talking about whether the cycle gains or loses carbon.

If you burned the coal that you made with this machine until it was all back to CO2, THEN it would be carbon neutral.

By that logic, bio-fuels would not be considered carbon neutral......

Carbon neutral and non-neutral relate to releasing carbon that is trapped (i.e. oil, coal) and doesnt participate in the "short-term" carbon cycle. You can plant and burn trees for eternity and the amount of carbon going into and from the air will be (almost) neutral. If you turn trees into coal, but can grow more trees, you will slowly deplete carbon from the atmosphere, and have it in your trunk.

If instead you take all the oil and coal and burn them you will be adding a lot of otherwise non-gaseous/non-carbon-cycle carbon into the carbon-cycle