text: what are the common laboratory apparatus in physics and what are their uses?   weighing scale : find weight (newtons) of object measuring cylinder: find volume displacement can : find volume retort stand: hold stuff stopwatch : measure time metre rule : length  metal weights : to vary the amount of force acting on an obj. knife edge: create pivots to give u trouble balancing stuff. lenses : light/ focal length experiments torchlights : same cross-wire obj. : act as the object. mirrors, glass blocks for light too. electricity: batteries , resistors , rheostats, jocks,crocodile clips