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.
viewpoint noun [C] (SIGHT) âº UK US overlook a place from where a person can look at something, especially at an area of natural beauty: The viewpoint by the side of the road gave us a stunning panorama of the whole valley.