What does a change refer to?
Difference in initial and final state of an object
Similarity in state of affairs
Chemical phenomenon of knowing something
Physical phenomenon of asking questions
Change is defined as difference in state of affairs.
For e.g. When ice cream melts, its shape and size becomes different, so it's a change.
Once a zero potential energy reference state is chosen, the changes in potential energy for a given initial and final states
What happens to water if
(a) it is kept in a deep freezer?
(b) it is heated?
Explain the phenomenon of change of state of water.