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No, butter will last longer in the refrigerator than 2 weeks. You need to keep the butter in an airtight container to insure freshness. Butter also can be frozen.
Butter will be OK for at least a couple days after the power goes off. The concern is more about quality and rancidity, not food pathogens.
Experts say 1 month in the refrigerator and 6 months in the freezer. But most people agree that if wrapped tightly it will last 4 months in the refrigerator and up to a year in the freezer. I grew up on a dairy farm and we never had a problem.
a SMEG refrigerator
Apples in a plastic bag last a little longer than apples in a foil bag.
That will depend upon the condition of the apple when placed on the counter, the ambient temperature and humidity, and the apple's pedigree. Some varieties keep longer than others. Some do better without refrigeration than others. But all apples do best under refrigeration.
Canned apple pie filling can last indefinitely as long as the can is not open. After opening, apple pie filling should be kept in the refrigerator for no more than three days before being baked in a pie.
Oranges can last from 2-3 weeks if left out of the refrigerator. Or 2 months if stored in the refrigerator.
in the fridge
I worked in a bakery that made huge vats of butter-cream and stored it in 5 gal buckets, out of refrigeration, for up to a week. That being said, if you are using real butter (as opposed to margarine) I would recommend using it as soon as it is made and refrigerating any leftovers within a couple of hours. Not only will you risk spoilage otherwise, but overly soft buttercream is very hard to decorate with.
Most foods should be safe for 3 - 5 days if stored in the refrigerator.
Neither an apple or a pineapple can.