For whipped cream--no.
For just about everything else--yes. It won't be quite as heavy, rich and creamy. But that's probably fine.

Depends on the recipe, but for most things it will work pretty similarly.

Yes..but it will not be quite as rich..

I always have organic full fat half and half around because I like it in my coffee. When a recipe calls for heavy cream, can I sub out half and half? Thanks...