Added archimedes principle (physics) (#7143)

* Added archimedes principle (physics)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* reformated

* reformatted archimedes principles

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>