This would depend on the manufacter of the oven and what temperature you have it set to but it can typically take 20 - 30 minutes to fully heat up.
# put oil on it # Heat it up i dont no 4 sure, but im pretty sure!
to heat up the toast .
a solar cooking oven
i think when you heat it up a oil balloon i think it gonna melts.
In small oven heaters.
It means open up the can, put the food or whatever inside into a saucepan then light the cooker and heat it. You can heat it up in microwave oven but in my opinion, food is not so good when heated in oven.
The oven doesn't heat up. The air inside stays at room temperature (although that would be difficult to measure). What heats up is the substances you place in the oven that absorb 2.5 GHz radio energy effectively ... mostly water and fats in foods.
So the oven is at the correct temperature for cooking. As soon as you place the item in the oven it will begin the cooking process rather than waiting for the oven to warm up.
Black absorbs heat instead of radiating it away so would heat up the oven quicker ;)
This depends on the type of oven you have (e.g. gas versus electric), as well as the make/model of the oven. Some ovens are able to heat up a lot faster than other ones.
butter