What is the difference between a static variable and a dynamic variable in java/oops?

Question

please someone tell me the difference between a \'static variable\' and a \'normal variable\' in oops or in java. Also their usage if possible.

Answer 1

Static variables (should) remain the same e.g. temperature of a water bath, k constant of a particular spring. Dynamic variables change as the experiment progresses e.g. air temperature and pressure, amount of natural light.