Beak example sentences

Note that the system may be defined by physical boundaries, like beaker or test tube, or the system may simply be defined by a set of Cartesian coordinates specifying a particular volume in space.For example, if we are studying the reaction between two substances A and B kept in a beaker, the beaker containing the reaction mixture is the system and the room where the beaker is kept is the surroundings.We take a system containing some quantity of water in a thermos flask or in an insulated beaker.Here the boundary is an imaginary surface enclosing the beaker and reactants.The presence of reactants in an open beaker is an example of an open system*.