The difference is that she's and similar shortened forms are used in colloquial speech, but not in certain cases. She was in on the drama when the conman showed up at the stage door. It is not needed because the questions could be more concisely put as where is she/he?.
I wouldn't be surprised in the slightest if a man referred to a vacuum cleaner as she. When referring to google ngram, i get 3 possible combinations of she's: She was in the movie cat on a hot tin.
If you are an actor in something, it's in: Is it quit or quitted? In your example, she is being emphasised. What is the correct (grammatical) simple past and past participle form of the verb quit?
She was in cat on a hot tin roof. (she has quitted her job.) she quit her job. Upon answering the telephone, the person calling asks if joan is available. This redundancy, and the efforts of seventeenth and eighteenth century.
If joan is the person who answered the phone, should she say this is her or this is she? Taken from the free online dictionary: Most of the she style labels i hear are half terms of endearment and half self mockery.