A compact fridge hold very little, but it will highly vary on which compact fridge you select. I highly suggest the following: http://www.Walmart.com/cp/Refrigerators-and-Freezers/90791.
A compact Comet fridge with a freezer combination can cost anywhere from $100 to $300. It all depends upon which features you need with your fridge and freezer combo.
15 liters!
Compact fridges are very useful to have, and have many good uses. A compact fridge could easily be found in places like Walmart or Best Buy for a good, affordable price.
About 700Mb OR the equivelant of about 80 minutes of CD-Audio.
Compact refrigerators can be purchased at your local hardware store. However, if you are not in a rush, it is worth checking your local thrift shops. Goodwill is known to sell compact refrigerators for as low as $30!
Yes it will keep things 40 or below
Depends how compact-able the garbage is.
depends on why you are measuring it... if you are measuring to know how much food it can hold, measure inside.
electromagnetic force - specifically magnetic
While there are some older, extinct technologies from long ago, Compact Discs tend to hold 700MB of data or 80 minutes of CD audio.
CD = compact disk. As opposed to large floppy disks. A disk because it's round. Compact because it'll hold so much more data than a floppy.
a magnet