Food storage areas need to have temperature control systems to allow the food to be stored for a long time. If the temperature drops too low the food is damaged by cold, if the temperature rises too high then the food starts decaying
Yes.
At that temperature, the food will continue to cook and dry out, so you don't want to keep it at that temperature for very long or the quality might be negatively affected. Pathogens don't grow at those temperatures, so it would be safe even if not very tasty.
Yes.
not too long
The best fresh food temperature is 40 degrees Farenheit. If it's any colder then the food is likely to freeze, and any warmer then the food won't keep as long or as safely.
as long as u want
It depends on the type of food and what temperature is needed for its pasteurization.
yes,but it will take a while its better to leave it under cold water for about 8 mintues
90 degrees Celsius is very hot, withing about 8 hours any food subject to that temperature will be cooked and sterile. Further keeping at that temp will see the food desiccate.
Butter can last for days at room temperature. But it is not recommended to leave it out for that long.
Food can have bacteria grow on it as soon as an hour at room temperature. Our stomach acid can kill some of this bacteria.Leave food out no longer than a few hours if you do not want to get sick.