You most certainly can, but whether it is advisable depends upon it's state when it was 'out' and where it had previously have been 'in' - one presumes either a pressurised can or bottle or frozen or refrigerated.
Then it will depend on the character of the place it has been 'out' - including the temperature and whether it has been covered or exposed to a noxious atmosphere.
I understand that within the catering industry in Europe that food that has been at room temperature, say '15 - 20° Centigrade' is recommended to only be 'out' for a limited time of maybe 2 hours before it is consumed or put 'in' or discarded.
Yes, any food left out for 48 hours is unsafe to eat and should be thrown out.
If by "fresh," you mean safe to eat, cooked meatballs should be good refrigerated for 3 to 4 days. If you wish to keep them longer, you should freeze them.
3 days
aslong as they canbe fussed to.
Cooked fish should be good for 3 to 4 days refrigerated.
1,000,000,000,000,000,.1 days
As a rule of thumb and in my opinion, fish should not be refrigerated for more than one day. After that, they can still be eaten safely as long as the refrigerator is in good working condition but, it will be extremely dry in the mouth and may even taste fishier if it was not cooked correctly.
It should be refrigerated within two hours or less.
Not home-cooked ones. Some commercially-produced hard cooked eggs can keep that long, but I wouldn't call them 'fresh'. See Related Links.
Red meat: 5 days, white meat: 3
5 days
If it's sealed well and most of the air removed from the package, it can last months.
Cooked steak will keep in the fridge for 3-5 days.
A raw turkey should be cooked within a couple days of thawing or purchase (if not frozen).