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.
electric, but it alot of times depends on the stove quality.
200-250
Yes.
An electric double oven and an electric single oven would have about the same capacity. The only difference between the two is that you can cook two things at the same time with different temperatures using the double oven. It may even heat up faster as well.
Gas ovens do save more money than electric ovens. But the drawback to a gas oven versus electric is that you do not get even heat exchange with gas as you do with an electric oven.
A typical electric oven has a heating element, a length of metal that acts as an electrical resistor. As electrical current passes through, the heating element becomes hot. The oven will either be a convection oven or not. A non convection oven relies on the heating element warming the air, and this in turn warms the food. A convection oven uses circulating air inside the oven. Circulating the air causes faster heat transfer from the heating element to the air, and faster heat transfer from the air to the food than with simple heat conduction only.
The difference is the way the heat is produced. In an electric oven electricity runs through the heating element to produce heat. In a gas oven there is a gas jet that is actually burning, lit by the pilot light and that is how the heat is produced. The gas oven is superior for cooking, but required you to have gas lines in your house and comes with the added risk of flamable gas. <><><> The easy answer is that a gas oven uses gas to heat and an electric oven uses electricity <><><> Using gas, you have the required heat in seconds, not minutes if using an electrical oven. Its just easier to change the temperature level on a gas oven, and faster. People who are used to cooking with gas have time issues with electric ovens. <><><> An electric convection uses electric bake and broil elements and one or more fans in the back of the oven to circulate heat, this is called either fan assist baking or "convection" HOWEVER,,, in order to be a "true convection", "europian convection", or "true europian convection", it MUST HAVE A THIRD ELEMENT!!! The third element is located behind the fan/fans in the back of the oven. If there's not a third element on an electric range, it is not a true convection oven. With gas, typically, it will just be a fan assist bake using gas heat. However, if it is a true convection, europian convection, or true europian convection, it will have an electric-yes electric- element behind the fan/fans that is run off of the 120 outlet just like the electronic ignighters and digital controls.
The heat source is probably from a flame, an oven, or from an electric stovetop. The metal pan or sheet helps to trap the heat and transfer it to the cookies. If there is too much heat or the heat is applied for too long, the the cookies will burn.
ovens produce heat my an electric charge of the battery that contains hot air and makes the oven hot and to heat your food
Light energy from IR rays to heat energy into water droplets in the oven
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.
If the food directly touches something (e.g. pan, oven grate, oven walls, red hot electric element) heat is transferred by conduction.