Looking again at the explainthatstuff.com QR code up above, we have: 1  Quiet zone: An empty white border that makes it possible to isolate the code from among other printed information (for example, on a dirty envelope, among the black and white print of a newspaper, or on smudged product packaging).
Valid units must be of the length type. âºâº Definition: Centimeter. A centimetre (American spelling centimeter, symbol cm) is a unit of length that is equal to one hundreth of a metre, the current SI base unit of length. A centimetre is part of a metric system. It is the base unit in the centimetre-gram-second system of units. A corresponding unit of area is the square centimetre.
A cubic centimeter is a unit of volume accepted and widely used in the countries recognizing the SI standards. This unit is corresponding to the volume equal to the one of a cube with 1 cm each side. Therefore, one cubic centimeter is equal to 1/1 000 000th of a cubic meter. It is also roughly equal to 1 ml, or 1/1000th of cubic liter. The symbol of a cubic centimeter is cc, and this volume unit is very widely used in such fields as medicine, engineering, technology, etc.