The ruler measures such a physical quantity as body dimensions (length, height, width), distance traveled, movement. The SI unit of measurement is the meter.
A beaker measures such a physical quantity as the volume of a liquid or gas. The SI unit is the cubic meter.
The stopwatch measures the physical quantity time. The SI unit is the second.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.