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archemedies
When he was 27, in 260 B.C.
Jeff Bruce is the principal of Jean Batten Primary
The same gases as today.
Last I heard he had a private school.
Last I heard he had a private school.
Every action will involve a scientific principal in some way.
Yes, when it is used as part of the proper noun or when it precedes a person's name. Examples: The principal is now at his office. I saw Principal Smith in his office a while ago.
It was a temple for the principal gods.
to be mad in the exam.
True
Seems Prin. is the commonest abbreviation. If the reader is expected to know that "Principal" might be used, then P.could be used. Target your audience appropriately.