Why strain don't have any unit?

What is Poisson’s ratio? Why does it have no unit?

What is Poisson’s ratio? Why does it have no unit?

The artificial satellite do not have any fuel but even it remains orbiting around the earth. Explain why .

Why strain has no unit?

Recall the experiment done by Frederick Griffith. If RNA, instead of DNA was the genetic material, would the heat killed strain of strep have transformed the R-strain into virulent strain? Explain your answer.

A process occurring in an isolated system does not have any effect on its surrounding and the process is also not influenced by its surroundings. Why?

Why fluorine does not form any oxyacid?