The term colonialism is frequently used to describe the settlement of North America, Australia, New Zealand, Algeria, and Brazil, places that were controlled by a large population of permanent European residents.
QR code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional barcode) first designed for the automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached.
Reaction quotient. In chemistry, a reaction quotient (Qr) is a function of the activities or concentrations of the chemical species involved in a chemical reaction. In the special case that the reaction is at equilibrium the reaction quotient is constant and equal to the equilibrium constant that appears in the expression of the law of mass action. A general chemical reaction in which Î± moles of a reactant A and Î² moles of a reactant B react to give Ï moles of a product R and Ï moles of a product S can be written as