volunteer or intern
Free lance
Pro-bono
free energy
The work done by a machine is called work output
The ability to do work is called "Energy" from what I've gathered.
Free lance
Slavery
Pro-bono
Leisure time. Read a health book.
Free lancers are the person who does not work for any company or organisation. They work for themselves when and where needed. Companies uses these people on contractual basis to work for them whenever required. And this process is called Free Lancing.
free energy
There is a site called Freewildcoins.com you can get free wild coins there. They are partners with The Hp Wild games site. this dont work
In free expansion, the external pressure is zero, i.e. work done is zero. Accordingly, free expansion is also called irreversible adiabatic expansion.
Chemical energy
There is a company called Genesis Eldercare that will train for free if you work with them for a year.
Macrophages in the alveoli are scavengercells that work to keep the lung free of "foreign" materials.
Lowes has something called "desk design solution". There is a website called bighammer.com that has a free deck design software. There is another website called decks.com that allows a person to work with someone and get great design ideas.