Energy Diagrams. We know that in order for a reaction to occur, reactant molecules must collide and that both an increase in the concentration of reactant molecules and an increase in the temperature of the system can cause an increase in reaction rate.
viewer - Computer Definition. (1) A program that renders the contents of a digital file on screen. Also called a browser, viewers may be stand-alone programs or components within a larger application. For audio and video formats, media players are used. See file viewer, graphics viewer, newsreader and media player. (2) A person who looks at an image or watches a movie.
User (computing) Within a computer program or website, a user is often represented by an abstract icon of a person. A user is a person who uses a computer or network service. Users generally use a system or a software product without the technical expertise required to fully understand it. Power users use advanced features of programs, though they are not necessarily capable of computer programming and system administration.