It really depends on what food you cook but then it's normally, 2 hours of cooking food after it is removed from an appliance keeping it hot and warm, leftovers must be refrigerated.As well bacteria grow rapidly between the temperatures of 40°F and 140°F.
At least 15 seconds or 2 hours. Try it on your microwave if you have the time!
Source/Proof:"Food that is reheated must reach a minimum internal temperature of at least 165 F for 15 seconds. Reheating must be done rapidly and the minimum temperature must be reached within two hours."
understanding of the differences between themselves and people from other countries or other backgrounds, especially differences in attitudes and values.